| takhús |  | tach- | swift | ταχύς (takhús), τάχος (tákhos) | tachometer, tachycardia, tachyrhythmia, tachytelic |
| teínein |  | taeni- | ribbon | τείνειν (teínein), ταινία (tainía), ταινίδιον (tainídion) | diplotene, leptotene, pachytene, taenia, taenidia, taenidium, taeniodont, Taeniolabis, zygotene |
| tássein |  | tag- (ΤΑΓ)[197] | arrange, order | τάσσειν (tássein), τακτός (taktós), τακτικός (taktikós), τάξις (táxis), τάγμα (tágma) | ataxia, chemotaxis, epitaxis, eutaxy, hypotaxis, magnetotaxis, metasyntactic, parataxis, phonotactic, phonotactics, phototaxis, rheotaxis, syntactic, syntagma, syntagmatic, syntax, tactic, tagma, taxis, taxonomy, thermotaxis |
| tarássein |  | tarac- (ΤΑΡΑΧ)[198] | stir | ταράσσειν (tarássein), ταρακτός, ταρακτικός, τάραγμα, θράσσω | ataractic, ataraxia |
| tarsós |  | tars- | ankle | ταρσός (tarsós, “a flat basket”) | metatarsus, tarsal, tarsoclasis, tarsometatarsus, tarsus |
| taûros |  | taur- | bull | ταῦρος (taûros) | Minotaur, taurobolium, taurocholic, tauromachy |
| |  | tec- (ΤΑΚ)[199] | melt | τήκειν | eutectic, eutectoid |
| tókos |  | tec-, toc- (ΤΕΚ)[200] | childbirth | τίκτειν, τόκος (tókos) | ditokous, dystocia, embiotocid, monotocous, teknonymous, teknonymy, tokophobia |
| tíktein |  | techn- (ΤΕΚ)[201] | art, skill | τίκτειν (tíktein), τέχνη (tékhnē), τέκτων, τέκτονος (téktōn, téktonos), τεκτονικός (tektonikós) | architect, polytechnic, techne, technique, technocracy, technocrat, technogaianism, technology, technophilia, technophobia, tectonic |
| téknon |  | tecn- (ΤΕΚ)[202] | child | τίκτω, τέκνον, τέκνου (téknon, téknou) | teknonymous, teknonymy |
| têle |  | tele- | far, end | τῆλε (têle) | telegram, telegraph, telemetry, telepathy, telephone, telescope, television |
| télos |  | tele- | complete | τέλος, τέλεος (télos, téleos), τέλεσις (télesis) | atelectasis, ateleiosis, atelophobia, teleology, telesis, toll |
| témnein |  | tem-, tom- [203] | cut | τέμνειν (témnein), τομός (tomós), τόμος (tómos), τομή (tomḗ), τμῆσις (tmêsis) | acrotomophilia, anatomy, apotemnophilia, atom, atomic, autotomy, diatom, dichotomous, dichotomy, ectomy, entomology, entomomancy, entomophagous, entomophilous, epitome, monatomic, pentatomic, polyatomic, polytomy, Temnospondyli, tmesis, tome, tomogram, tomography, trichotomous, trichotomy |
| teínein |  | ten-, ton- [205] | stretch | τείνειν (teínein), τεινόμενον, τανύειν (tanúein), τετανός (tetanós), τόνος (tónos), τονικός (tonikós), τονή (tonḗ), τάσις (tásis), ταινία | anhemitonic, atelectasis, atonic, atritonic, barytone, catatonia, catatoniac, catatonic, decatonic, diatonic, ditone, dodecatonic, dystonia, ectasia, enneatonic, entasia, entasis, epitasis, hemitonia, hemitonic, heptatonic, hexatonic, hyperisotonic, hypertonia, hypertonic, hypotenuse, hypotonia, hypotonic, isotonic, microtone, monotone, monotonic, monotonous, monotony, neoteny, octatonic, oxytone, paroxytone, pentatonic, peritoneum, polytonic, proparoxytone, protasis, pyelectasis, syntonic, tetanolysin, tetanospasmin, tetanus, tetany, tetratonic, tone, tonic, tonoplast, tritonic, tune |
| tēreîn |  | tere- | guard | τηρεῖν (tēreîn), τήρησις (tḗrēsis) | synteresis |
| tétartos |  | tetart-[207] | fourth | τέταρτος (tétartos) | tetartanopsia, tetartohedric |
| téssares |  | tetr- | four | τέτϝαρες, τέσσαρες, τεσσάρων (téssares, tessárōn) | diatessaron, tetragon, tetrahedron, tetralogy, tetrameter, tetraphobia, tetrapod, tetrode |
| teúkhein |  | teuch- | make | τεύχειν (teúkhein), τυγχάνω, τευκτός, τευκτικός, τεῦξις (teûxis), τεῦγμα (teûgma), τεῦχος, τεύχεος (teûkhos, teúkheos), τύχη (túkhē), τυκτός (tuktós) | Heptateuch, octateuch, Pentateuch |
| thálamos |  | thalam- | chamber, bed | θάλαμος (thálamos) | epithalamion, hypothalamus, prothalamion, thalamotomy, thalamus |
| thálassa |  | thalass- | sea | θάλασσα (thálassa) | Panthalassa, thalassemia, thalassic, thalassophobia |
| thánatos |  | than- (ΘΑΝ)[208][209] | death | θνήσκειν, θάνατος (thánatos) | euthanasia, thanatocoenosis, thanatoid, thanatology, thanatophobia, thanatophoric, thanatopsis |
| thaumat |  | thaumat- | miracle | θαυματ (thaumat) | thaumatology, thaumaturge, thaumaturgy |
| theós |  | the-, thus- | god | θεός (theós) | atheism, atheistic, ditheism, enthusiasm, monotheism, Pantheon, polytheism, Thea, theobromine, theocracy, theodicy, Theodore, theogony, theology, theophobia, Timothy, tritheism |
| tithénai |  | the- (ΘΕ)[210] | put | τιθέναι (tithénai), θετός (thetós), θετικός (thetikós), θέσις (thésis), θέμα (théma), θήκη (thḗkē) | anathema, anathematic, antithesis, antithetic, apothecium, athematic, Bibliotheca, bodega, boutique, deem, doom, enthesis, enthetic, epenthesis, epenthetic, epitheca, epithet, hypothec, hypothesis, monothematic, nomothetic, oligosynthetic, parenthesis, parenthetic, polysynthetic, prosthesis, prosthetic, prothesis, prothetic, pseudothecium, synthesis, synthetic, theca, thecium, thematic, theme, Themis, thesaurus, thesis, treasure |
| theâsthai |  | thea- | view | θεᾶσθαι (theâsthai), θέατρον (théatron) | amphitheatre, metatheatre, theatre, theatric |
| thēlḗ |  | thel- | nipple | θηλή (thēlḗ) | athelia, endothelium, epithelium, mesothelioma, mesothelium, thelium, thelial |
| theōrētikós |  | theori- | speculation | θεωρητικός (theōrētikós), θεώρημα (theṓrēma), θεωρία (theōría) | theorem, theoretic, theorist, theorize, theory |
| thērós |  | ther- | beast, animal | θήρ, θηρός (thḗr, thērós) | therianthropy, theroid, theropod, theropsid |
| therápōn |  | therap- | serve | θεράπων (therápōn), θεραπεύειν (therapeúein), θεραπευτός, θεραπευτικός (therapeutikós), θεραπεία (therapeía) | therapeutic, therapist, therapy |
| théresthai |  | therm- | heat, warm | θέρεσθαι (théresthai), θέρμη (thérmē), θερμός (thermós) | thermal, athermancy, diathermancy, ectotherm, endotherm, endothermic, exothermic, geothermic, homeothermy, hyperthermia, hypothermia, isotherm, poikilotherm, thermobaric, thermochromism, thermodynamic, thermolysis, thermometer, thermophilic, thermophobia, thermoplastic, thermoplegia, thermos, thermosphere, thermostat, thermostatic |
| thingánein |  | thig- (ΘΙΓ)[211] | touch | θιγγάνειν (thingánein), θίξις (thíxis), θίγημα (thígēma) | antithixotropic, thigmonasty, thigmotaxis, thixotropic, thixotropy |
| thṓrax |  | thorac- | chest | θώραξ, θώρακος (thṓrax, thṓrakos) | hemothorax, pneumothorax, thoracic, thorax |
| thumós |  | thym- | mood | θυμός (thumós) | dysthymia |
| thúra |  | thyr- | door | θύρα (thúra) | thyratron |
| thureós |  | thyre- | large shield | θυρεός (thureós) | Thyreophora, thyroid, thyrotropin, thyroxine |
| tomḗ | | tom- | cut | τομή (tomḗ), τόμος (tómos) | anatomy, appendectomy, atom, dichotomy, ectomy, embolectomy, tome, tonsillectomy, vasectomy |
| teínein | | ton- (ΤΑΝ)[213] | stretch | τείνειν (teínein), τόνος (tónos), τονικός (tonikós) | isotonic, monotone, tone |
| tópos |  | top- [214] | place, location | τόπος (tópos) | atopic, atopy, dystopia, ectopia, ectopic, entopic, epitope, eutopia, isotope, nomotopic, polytope, topiary, topic, topography, topology, toponomastics, toponym, toponymy, topos, utopia, zonotope |
| tóxon |  | tox-[216] | arrow, bow, poison | τόξον (tóxon) | anatoxin, antitoxin, autotoxin, exotoxin, intoxicate, neurotoxin, psychotoxic, toxic, toxin, toxoid, toxology, toxoplasmosis |
| trakhús |  | trach-[217] | rough | τραχύς (trakhús) | trachea, tracheids, tracheitis, tracheophyte, tracheostomy, tracheotomy, trachoma |
| trágos |  | trag-[218] | he-goat | τράγος (trágos) | tragedy, tragic, tragus |
| trápeza |  | trapez-[219] | four-legged, table | τράπεζα (trápeza), τραπέζιον, (trapézion) | trapeze, trapezium, trapezius, trapezohedron, trapezoid |
| traûma |  | traum-[220] | wound | τραῦμα, τραῦματος (traûma, traûmatos) | trauma, traumatic, traumatize, traumatophobia |
| trékhein |  | trech-, troch-[221] | run, wheel | τρέχειν (trékhein), τρεχόμενον, τρόχος (tróchos), τροχός, τροχοῦ (trochós), τρόχωσις, τροχαῖος (trochaîos), τροχαϊκός (trochaïkós), τροχοειδής | ditrochee, epitrochoid, hypotrochoid, trochaic, trochanter, trochee, trochelminth, trochlea, trochophore, trochoid |
| treiskaídeka |  | treiskaidek- | thirteen | τρεισκαίδεκα (treiskaídeka) | triskaidekaphobia, triskaidecagon |
| trêma |  | trema- | hole | τετραίνω, τρῆμα (trêma) | monotrematous, monotreme, trema, tréma, trematode |
| trépein |  | trep-, trop-[222] | turn | τρέπειν (trépein), τρέψις (trépsis), τρόπος, τρόπου (trópos), τροπή, τροπῆς (tropḗ), τροπικός (tropikós) | allotrope, anisotropy, Atropos, ectropion, entropic, entropion, entropy, heliotropism, isentropic, isotrope, isotropic, isotropy, pleiotropic, pleiotropy, polytrope, protrepsis, protreptic, psychotropic, treponeme, treponematosis, treponemiasis, trope, tropic, tropism, tropopause, troposphere, trove |
| tréphein |  | treph-, troph-[223] | feed, grow | τρέφειν (tréphein), τροφός (trophós), τροφή (trophḗ), θρέμμα | amyotrophic, atrophy, autotroph, auxotrophy, chemolithoautotroph, dystrophy, hemidystrophy, heterotroph, hypertrophy, lithoautotroph, lithotroph, mixotroph, organotroph, phagotrophy, photoheterotroph, phototroph, phototrophic, phototrophy, pogonotrophy, poliodystrophy, prototrophy, trophectoderm, trophic, trophobiosis, trophobiotic, trophoblast, trophoblastic, trophozoite |
| tría |  | tri-[224] | three | τρεῖς, τρία (tría), τριάς | atritonic, triad, triadic, Triassic, tricycle, trigon, triode, tripod, trisyllabic, tritonic |
| tríbein |  | trib-, tript-[225] | rub | τρίβειν (tríbein), τριπτός, τρῖψις | diatribe, tribochromism, tribology, trypsin, tryptic |
| trikhós |  | trich- | hair | θρίξ, τριχός (trikhós) | peritrichous, trichopathophobia, Trichoptera |
| trítos |  | trit- [226] | third | τρίτος (trítos) | tritagonist, tritanomaly, tritanopia, trite, tritium |
| trokhós | | troch- | wheel | τροχός (trokhós) | trochlea |
| tropos | | trop- | turn | τρόπος (tropos) | contrive, heliotropism, isotrope, psychotropic, retrieve, trope, tropic, tropism, troposphere, troubadour, trove |
| trophós |  | troph- | feed, grow | τροφή, τροφός (trophós) | dystrophy, pogonotrophy, trophic |
| trupân |  | tryp-[227] | bore | τρυπᾶν (trupân), τρύπανον (trúpanon) | trepan, trypanophobia, trypanosome |
| túmbos |  | tymb-[228] | mound | τύμβος (túmbos), τυμβεύω, τύμβευμα | entomb, tomb |
| túmpanon |  | tympan- | drum | τύμπανον (túmpanon) | timbre, timpanist, tympani, tympanum |
| túptein |  | typ-[229] (ΤΥΠ[230]) | stamp, model | τύπτειν (túptein), τύπος (túpos), τυπικός (tupikós), τύμπανον (túmpanon) | allotype, archetype, ecotype, ectype, epitype, ergatotype, heterotype, heterotypic, holotype, homeotypic, homotype, homotypic, isosyntype, isotype, lectotype, logotype, monotypic, neotype, paralectotype, paratype, phenotype, prototype, schizotypic, syntype, type, typography, typology |
| túphein |  | typh-[231] | smoke | τύφειν (túphein), τῦφος (tûphos), τυφώδης | typhoid, typhous, typhus |
| túrannos |  | tyrann-[232] | terrible, tyrant | τύραννος (túrannos) | tyrannize, tyrannosaurus, tyranny, tyrant |
