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to bite off; to gnaw through
この肉は硬くて噛み切るのが大変だった。
This meat was so tough that it was hard to bite through.
犬がロープを噛み切って逃げ出してしまった。
The dog bit through the rope and escaped.
彼女は糸を噛み切って縫い物を終えた。
She bit off the thread and finished her sewing.