noun
double-dealing; duplicity; two-facedness
Refers to the act of saying different things to different people, or being hypocritical. Often used in formal or literary contexts to describe untrustworthy behavior.
彼の両舌な態度に、周囲は次第に不信感を募らせた。
His double-dealing attitude gradually made those around him more distrustful.
政治の世界では、両舌を使い分けることが時に必要
In the world of politics, it is sometimes necessary to speak with a forked tongue.
Compound of 両 (both) and 舌 (tongue), literally 'both tongues'. The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning of speaking inconsistently.