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笑う, 嗤う, 咲う, わらう
1. to laugh
2. to smile
3. to sneer, to ridicule
4. to be dumbfounded, to be flabbergasted
笑;微笑;冷笑,嘲弄;冷笑,嘲弄
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ずにはいられない, ずには居られない
1. feel compelled to, can't help but feel, can't help but do
tbd