歯をかみ合わせてみてください。

tooth

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to gear (engage) with; to be in gear (mesh); to bite each other

to give; to confer; to bestow; to kindly do for one; to oblige; to favour; to favor