unbiddenadj.
英 ʌn'bɪd(ə)n | 美 ʌn'bɪdn
中文adj. 未受邀请的；未受指使的；自愿的
词根词源
unbidden (adj.)Old English unbedene, "not asked or invited," from un- (1) "not" + bidden. Similar formation in Middle Dutch ongebeden, German ungebeten, Old Norse ubeðinn.
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