Compound of 爪(つめ) (tsume, “nail”) + 噛(か)み (kami, 連(れん)用(よう)形(けい) (ren'yōkei, “stem or continuative form”) of the verb 噛(か)む (kamu, “to bite”)).
爪(つめ)噛(か)み • (tsumekami)