underhanded

adj.秘密的

秘密且不光明正大的；狡猾的；不诚实的

形容词

1. He used underhanded tactics to win the game.
他使用不光明正大的策略赢得了比赛。
2. The politician's underhanded dealings were exposed by the media.
媒体曝光了这位政客的不诚实行为。