1. making a round trip, going and returning, coming and going
2. round-trip ticket, return ticket
3. correspondence, exchanging (of letters)
4. keeping company (with), socializing, visiting each other
1. to get on (train, plane, bus, ship, etc.), to get in, to board, to take, to embark
2. to get on (e.g. a footstool), to step on, to jump on, to sit on, to mount
3. to reach, to go over, to pass
4. to follow, to stay (on track), to go with (the time...
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