ころ
kamikorosu

Godan Verb (su)

1. to stifle a smile, yawn, etc.

Transitive
わたくしはあくびをかみ ころした。
watashiwa akubio kamikoroshita
I suppressed a yawn.
Godan Verb (su)

2. to bite to death

Transitive
Other forms: