My Suggestions

cuuma

n. · class 9/10

  1. iron, metal. Iron; a hard metallic element used for tools, weapons, and construction

Example: Gũkuua mũrigo wa mũthanga, cumbĩ, na cuuma nĩ mũhũthũ gũkĩra gũtwarana na kĩrimũ. (SIR 22:15) — Sand, salt, and an iron weight are easier to bear than the stupid person.