咬定牙根 yǎodìngyágēn to grit one's teeth Origin Definitions Defs Strokes Stroke Words Sentences Sents 咬定 yǎodìng to insist to assert emphatically; to stick to one's word or story and refuse to change it牙根 yágēn tooth root The part of a tooth that is embedded in the socket of the jawbone.