fundament

noun fun·da·ment \ˈfən-də-mənt\

Definition of FUNDAMENT

: an underlying ground, theory, or principle

a : buttocks

b : anus

: the part of a land surface that has not been altered by human activities

Middle English foundement, from Anglo-French, from Latin fundamentum, from fundare to found, from fundus

First Known Use: 13th century

Synonyms: backside, behind, booty (also bootie) [slang], bottom, breech, bum, buns, butt, caboose, can, cheeks, derriere (or derrière), duff, fanny, buttocks, hams, haunches, heinie [slang], hunkers, keister (also keester) [slang], nates, posterior, rear, rear end, rump, seat, tail, tail end, tush [slang]

Medical Dictionary

noun fun·da·ment \ˈfən-də-mənt\

: anus

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