definitive (adj) – conclusive, decisive, or complete
BREAKDOWN: DE- (from) + FIN- (end) + -ITE (connected with) + -IVE (state of)
— to define is to determine or describe with precision; to explain or make clear
— definition is expression or reproduction with clarity and fidelity
This word is built on the root FIN-, which means end, last, or limit.
Common FIN- words include confine, define, final, finance, fine, finish, and infinity.
More esoteric FIN- words include finery, financier, paraffin, and superfine.