Duck is a common noun referring to a waterfowl with a broad bill and typically webbed feet; it is also used informally as a verb meaning to lower one's head quickly, or as an endearment in phrases like “little duck.” In everyday English, it denotes both the animal and the act of lowering one's head, with primary stress on the single-syllable word. The term appears across literature, conversation, and media, and serves as both a concrete noun and a versatile verb/idiom in various dialects.
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