kah甲

shell

shell; carapace; plate armor; nail (plate at the end of fingers and toes); the first of the ten heavenly stems

particle

English Wiktionary, “甲” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E7%94%B2 · confidence: High (Wiktionary, PH/Quanzhou/Jinjiang)