adj.秘密的；陰險(xiǎn)的；下投的
adv.低手地；秘密地
That fellow has an underhand scheme. 這家伙懷有不可告人的目的。
An honest man does nothing underhand. 明人不做暗事。
He got the money in a very underhand manner. 他用極為狡詐的手段弄到了這筆錢。
I would never have expected her to behave in such an underhand way. 我從未想到她的行為竟如此陰險(xiǎn)。
用作副詞 (adv.)Maybe I can understand why you acted underhand. 也許我能理解,你為何如此躲躲藏藏。
