· the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture"

Synonym(s): basis, base, foundation, groundwork, cornerstone

Hypernym(s): assumption, supposition, supposal

· the fleshy part of the human body that you sit on; "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"

Synonym(s): buttocks, nates, arse, butt, backside, bum, buns, can, hindquarters, hind_end, keister, posterior, prat, rear, rear_end, rump, stern, seat, tail, tail_end, tooshie, tush, bottom, behind, derriere, fanny, ass

Hypernym(s): body_part

· lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower"

Synonym(s): foundation, base, foot, groundwork, substructure, understructure

Hypernym(s): support