Clauson (1972)
An etimological dictionary of pre-thirteenth-century Turkish
p. 761
közŋü:
D közŋü: (g-) contracted Dev. N. (N.I.) fr. közün-, listed as a Dis. under fa'Id in Kaş.) ‘mirror’. Survives in NC Kır. küzgü: SC Uzb. küzgu: NW Kar. küzgü; Kumyk güzgü: SW Az. küzgü (g-); Tkm. gözgi, but elsewhere displaced by l.-w.s like Ar. 'ayna. See Doerfer III 1674. Türkü vm ff. words transcribed küzkü:si: and küzküm (no doubt misreadings of közŋü:si:, közŋüm) appear on two metal mirrors of unknown provenance ETY II 171; IrkB 22 (ıçğın-): Yen. [sek]iz bağı:r (sic) köznü:si: on kara: közŋü:si: ‘his eight copper mirrors and ten black mirrors’ Mal. 26, 11: Uyğ. vm ff. Man. (spirits) közŋü:çe közünüpen ‘appearing like (shapes in) a mirror’ M II 12, 6-7: Bud. közŋü:de ‘in a mirror’ USp. 102a. 10; a.o. TT VI 410-11 (etiglig): Civ. (he should rub in the salve and) közŋü:de körzün ‘look in a mirror’ H I 125: Xak. xi közŋü: al-mirdt ‘a mirror’ Kaş. III 379; o.o. III 45 (yüzlüg), 132 (5 kü:g): xiv Muh. al-mirdt ğö:zŋü: Mal. 68, 12; Rif. 169 (k-): Çağ. xv ff. közŋü (‘with k- -g-’) 'ayna ‘mirror’ Vel. 368; gözğü (‘with ğ-’) âyina ‘mirror’ San. 306v. 5: Xwar. xiv közŋü ‘mirror’ Qutb 109; MN 248: Kom. xiv ‘mirror’ küzgü CC7; Gr.: Kıp. xm al-mir’ât kö:zŋü: Hou. 18, 6: xiv köznü: (?közŋü: intended) ditto İd. 81: xv ditto közgi: Kav. 64, 10: Osm. xiv ff. gözgü (gözigü, gözügü), once (xiv) gözügü ‘mir¬ror’; c.i.a.p. TTS I 331; II 464; III 319; IV 364.