The Vietnamese word "quẫy" generally means to move or shake something vigorously. It can be used to describe the way an animal, especially a fish, moves in an energetic or frantic manner. Here’s a more detailed explanation:
In a more metaphorical or idiomatic sense, "quẫy" can be used to describe a person who is very active or agitated, not just limited to animals. For example: - "Anh ấy quẫy lên khi nghe tin vui." (He jumped up and down when he heard the good news.)
While primarily associated with vigorous movement, "quẫy" can also imply struggle or effort in other contexts. For example, it can describe a person who is trying hard to achieve something but might be facing difficulties.