boastfulWiktionary 原文中文来自 ECDICTadj.自夸的，自负的，喜夸耀的构词拆分boast词根/词干+-ful后缀Used to form adjectives from nouns, with the sense of being full of, tending to, or thoroughly possessing the quality expressed by the noun.演变路径（由近及远）英语继承自 ←中古英语 bostful词源说明From Middle English bostful, equivalent to boast + -ful.释义（英文）形容词 AdjectiveTending to boast or brag.词族派生词（4）overboastfulunboastfulboastfullyboastfulness