He's underhanded 他很阴险
Underhanded means sneaky or dishonest. You can be underhanded, or you can do something underhanded, such as telling your boss a lie so your co-worker doesn't get a promotion.
Underhanded的意思是阴险的,秘密的。比如你向你的老板撒谎,让你的同事得不到晋升
例句:
He's underhanded, you just can't trust him.他很阴险,你不能相信他。