infallibly(副词):绝无差错地;必定地;可靠地。常用来强调某事“每次都准”“从不出错”,有时也带一点夸张语气。
/ɪnˈfæləbli/
She can infallibly tell when someone is lying.
她总能准确无误地判断别人是否在说谎。
The tiny changes in his tone infallibly revealed his impatience, even when his words were polite.
即使他的话很客气,他语气里细微的变化也必定会暴露他的不耐烦。
来自 **in-**(否定前缀,“不”)+ fallible(“会犯错的,可能出错的”),而 fallible 源自拉丁语 fallere(“欺骗,使犯错”)。因此 infallibly 字面意思就是“以不可能出错的方式”。