lose

v.

1. To bring about a loss

   mislay, forget, be careless with; see misplace.

2. To incur loss

   suffer, miss, be deprived of, fail to keep, suffer loss, be reduced by, be impoverished from, become poorer by, be at a disadvantage because of, let slip through the fingers*, come out of the small end of the horn*; see also waste 1.

   Antonyms profit*, gain*, improve. *

3. To fail to win

   be defeated, suffer defeat, be worsted, be left behind, be outdistanced, go down in defeat, succumb, fall, be the loser, miss, have the worst of it, be humbled, take defeat at the hands of, drop*, go down for the count*, get it in the neck*, come out on the short end of the score*, be sunk*; see also fail 1.

   Antonyms win*, triumph*, be victorious.

4. To suffer financially

   squander, expend, dissipate; see spend 1, waste 2.