to persuade; to urge; to coax; to solicit
to make advances (to); to seduce; to court; to woo; to make a play (for); to make a pass (at); to come on to; to hit on
彼を口説いたが、最終的には断られた。
I tried to win him over, but he refused in the end.
三時間も彼女を口説いていたが、返事はもらえなかった。
I spent three hours trying to win her over, but never got an answer.
頑固な人を口説くのは時間がかかる。
It takes time to persuade a stubborn person.