Main entry: foot, foundation, fundament, base, understructure, substructure, groundwork
Definition: lowest support of a structure
Usage: it was built on a base of solid rock; he stood at the foot of the tower
Main entry: keister, seat, rump, rear, rear end, posterior, prat, fanny, fundament, ass, behind, arse, backside, hind end, hindquarters, bum, buns, butt, buttocks, can, bottom, derriere, tooshie, stern, tail, tail end, tush, nates
Definition: the fleshy part of the human body that you sit on
Usage: he deserves a good kick in the butt; are you going to sit on your fanny and do nothing?
Main entry: foundation, fundament, groundwork, cornerstone, base, basis
Definition: the fundamental assumptions from which something is begun or developed or calculated or explained
Usage: the whole argument rested on a basis of conjecture