"Cf. also the Svan (Lasx.} gagw . The semantic proximity of the forms is obvious.
The word may be compared with PIE 'gage':-— 'core. kernel' (of. Polcorny l959:
394). Ch'. *gugul— 'cuckoo': Georg. gugui- 'cuckoo'; lvlegr. gugui'—; Laz gttgto'—;
Evan g:'gu'—. Except for Georgian dialectal gugar_r(e)- (filongi 1994: 1151) the
Georgian~Zan forms are identical. The loss of the word-final I in Svan is regular.
An onomatopoeic origin of t ..."
Le Trésor de Troie Les fouilles d'Heinrich Schielmann (French Edition) von Anne Klimov, Véronique Schiltz Hardcover, 248 Seiten, Veröffentlicht 1996 von Editions Gallimard ISBN-13: 978-2-07-015033-5, ISBN: 2-07-015033-X