Nails also mean kucha
A nail is a horn-like envelope covering the tips of the fingers and toes in most primates
Msumari, misumari comes from Arabic مِسْمَار (mismār, "nail [spike]; pin; wedge"), which, according to the English Wiktionary, was borrowed from Aramaic מַסְמָר (masmār), מַסְמְרָא (masmərā, “pin, nail”).