mendacious

她发现他的故事满是谎言。

She realized his story was completely ___mendacious.

那家公司因其声称补品能治愈关节炎的虚假宣传被罚款。

The company was fined for its ___mendacious claims that the supplement could cure arthritis.

那个说谎的证人在证人席上被抓住自相矛盾。

The ___mendacious witness was caught contradicting his earlier deposition on the stand.