| beare | bless |  | verb | be-, beat- | beare, beatus | beatification |
| brevis | brief, short (time) |  | verb | brev- | brevis, breviare | abbreviate, brevextensor, brevicaudate, brevity, brief |
| bulla | bubble, flask |  | noun | bull- | bullire, bulla | bullectomy, bulliferous, ebullient, ebullism |
| bulbus | bulbous |  | adj | bulb- | bulbus | bulbiform, bulbiparous, bulboartrial, bulborrhexis, bulbous, bulbule |
| bucca | cheek, mouth, cavity |  | noun | bucc- | bucca | buccal, buccilingual, buccolingual |
| bos | cow, ox |  | noun | bov-, bu- | bos (genitive bovis) “ox, cow” | beef, boor, bovine, bucinator muscle |
| bibere | drink |  | verb | bib- | bibere, bibitus | bib, beer, beverage, imbibe |
| bonus | good |  | adj | bon- | bonus | bonify, bonitary |
| bene | good, well |  | adj | ben- | bene (adverb) | beneficence, benefit, benevolent, benign, benignant, benignity |
| bursa | pouch, purse |  | noun | burs- | bursa | bursa, bursalogy, bursar, bursary, bursectomy, bursiform, disburse |
| baculum | rod-shaped |  | noun | bac- | baculum | baculiform, baculum, bacteria |
| bis | two | 2 | noun | bi-, bin-, bis- | bis, “twice”; bini, “in twos” | bicycle, biennial, bifocal, bisexual, bigamy, binary, binoculars, biscotti |
| bellum | war |  | verb | bell-, belli- | bellum, belli | antebellum, bellicose, belligerent, rebellion |
