咬牙切齒

To bite or nip with teeth; to clamp or grip with a tool; to slander or implicate; to enunciate or pronounce words; skin irritation from contact with plants or chemicals.

Tooth; ivory; a middleman in a transaction; an official office; to bite.

to cut; to slice; to carve; to mince; to buy wholesale from a supplier; (geometry) tangential; (sports) to drive or slice a ball

Tooth or teeth; gear or cog; age; to rank or mention; to speak or discuss.