Tigrinya

ḳäränḳära - teschio (fig. – calvo) (skull (fig. – bald) (TED 944, Bassano 1918: 255)

Redupl. stem with a secondary ­n­; semantic interpretation should possibly be reverse: ‘bald’ > ‘skulľ.

PWS
*ḳrḥ - to have/make a hairless spot (on the head), to become/make bald (SED I No. 38v)