unctuous /ˈʌŋk.tʃu.əs/
His unctuous smile made me distrust him immediately.
他那种油滑的笑容让我立刻不信任他。
With an unctuous tone, the salesman praised every choice I made, as if nothing could possibly be wrong.
推销员用一种假殷勤的口吻夸赞我做的每个选择,仿佛不可能有任何问题。
/ˈʌŋk.tʃu.əs/
来自拉丁语 unctus(“涂了油/软膏的”),是动词 ungere(涂抹、上油)的过去分词形式,后来经由法语进入英语。因为“油润、滑腻”的触感容易让人联想到“圆滑、黏腻的奉承”,于是引申出形容态度与言辞“油滑、虚伪客套”的常用义。