1. to challenge to (a fight, game, etc.), to throw down the gauntlet, to contend for
2. to tackle (e.g. a problem), to attempt, to go after (a prize, record, etc.)
3. to pressure (someone) for sex, to make advances to
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
