台Taivo A Taiwan Mandarin dictionary

回合

huíhé

ㄏㄨㄟˊ ㄏㄜˊ

1one of a sequence of contests (or subdivisions of a contest) between the same two opponents
2round (boxing etc)
3rally (tennis etc)
4frame (billiards etc)
5inning
6(tennis, soccer etc) rubber or leg
7round (of negotiations)

Keep 回合 and it comes back until you know it.