The Proto-Kartvelian word gul
Word gul
Meaning heart, core

Comments
G. A. Klimov, Kartvelian, 1998 Walter de Gruyter

Other words that might be of interest
berq ‘leg, step’, dud ‘tip, top, head’, ḳ̣ud ‘tail’, ḳ̣uṭu ‘boy, penis’, ḳwad- ‘tail’, loḳ- ‘to lick’, mḳ̣erd ‘breast, chest’, nena ‘tongue, word, language’, pol- ‘hoof, leg’, prcxa ‘nail, claw’, qe ‘hand, arm’, q̣le ‘penis’, q̇wer ‘testicle’, q̣wiʓ₁ ‘to raise, wake, be awake’, šubl ‘forehead, front part’, taw ‘head’, twal ‘eye’, txem- ‘head, top’, zisxl ‘blood’, Ʒ₁u- ‘tail’