1.
If you ~ an opponent, you defeat them. (BRIT)
There is no reason why they cannot ~ the Republican challenge.
PHRASAL VERB: V P n (not pron), also V n P
2.
When you see someone off, you go with them to the station, airport, or port that they are leaving from, and say goodbye to them there.
Ben had planned a steak dinner for himself after seeing Jackie off on her plane.
PHRASAL VERB: V n P