korho.

From Proto-Finnic *korho (compare dialectal Estonian kore, Karelian korhota, Livonian ko’ŗŗi, Ludian korhištada, Veps korhotōdāzhe). The original meaning of the root was probably "to stand up, rise up", and all senses can be explained from this: * frizzy hair stands in a variety of directions, * sturdy/hulking people stand tall (i.e. rise above other people), * someone who is hard of hearing has to perk up (lift) their ears to hear better, * while the sense "proud, haughty" can most simply be explained as from the sense "sturdy, hulking", as someone who tries to make themselves look big.