double-dealing

名词 double-dealing:

1. acting in bad faith; deception by pretending to entertain one set of intentions while acting under the influence of another
   同义词：duplicity

形容词 double-dealing:

1. marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another- W.M.Thackeray
   同义词：ambidextrous, deceitful, duplicitous, Janus-faced, two-faced, double-faced, double-tongued

dou.ble-deal.ing

adj.（形容词）
Duplicitous or deceitful; treacherous.
口是心非的；被判的
n.（名词）
Duplicity or deceit; treachery.
口是心非，欺骗；背信弃义

【引伸】
dou.ble-deal.er
n.（名词）