Translation of "to gnaw" into Japanese

Some of my relatives have tried to gnaw on glass bottles.

わたしの親せきがガラスびんをかじろうとしたのです。

Wombats also have teeth that never stop growing—a boon for them, since they use their teeth to gnaw through underground obstacles.

ウォンバットには一生伸び続ける歯もあり,穴を掘り進める時に障害物をかみ切るのに役立ちます。