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to bite (at); to snap at
to snap at (someone); to flare up at; to jump down (someone's) throat
犬が郵便屋さんに噛み付いた。
The dog bit the mailman.
噛み付く癖を直したい。
I want to fix the biting habit.
子犬がスリッパに噛み付いている。
The puppy is biting at a slipper.