The term "won-lost" is a modern statistical compound specific to competitive sports, particularly North American leagues. It is constructed from the past participles of the verbs "win" and "lose," which themselves have deep Germanic roots relating to struggle and destruction, respectively. The hyphenated pairing emerged in the 20th century as a concise, formulaic way to represent a team's competitive outcome record. Its logic is purely descriptive and arithmetic, directly reporting the two fundamental results of any contest.

This is a compound adjective formed by joining two past participles, "won" and "lost," with a hyphen. "Won" originates from Old English winnan (to labor, toil, struggle) and later Middle English winnen (to gain by effort). "Lost" originates from Old English losian (to perish, be destroyed) and its past participle losod.