He used cajolery to persuade his boss to approve his request.

cajolery 是名词，来自动词 cajole（哄骗、劝诱）加上名词后缀 -ery 构成。cajole 本身源自法语，表示用甜言蜜语或虚假承诺来达到目的。cajolery 指"用奉承话或虚假承诺进行哄骗的行为"，即"甜言蜜语、哄骗手段"。