Clauson (1972)
An etimological dictionary of pre-thirteenth-century Turkish
p. 776
C ne:te:g
A combination of ne: with the Postposition te:g, q.v.; properly Interrogative ‘like what?’ but often used as a Relative Adv. ‘as, just as’. Survives only(?) in SW Osm. nete/nite ‘even’; netekim/nitekim/niteki ‘just as, even as; for example; thus’. Türkü viii ff. kere:kü: içi: ne:teg ol ‘what is the inside of the tent frame like?’ IrkB 18; a.o.o.: Uyğ. viii ff. Man.-A neteg ‘just as’ M I 23, 6 (ağız): Bud. Sanskrit katham ‘how?’ ne:te:g TT VIII A.23; yathā ‘as’ neteg do. B.12; ne:teg do. E.45; (I am ready to do) neteg yarlıkasar ‘as he commands’ U IV 16, 155; kaltı neteg . . . ançulayu ‘just as . . . so’ TT IV 12, 37; V 24, 51 etc.; a.o. U III 57, 6 (i) (osuğluğ): Xak. xi neteg ‘an Interrogative Particle’ (ḥarf istifhām) meaning kayf ‘how?’; hence one says neteg sen ‘how are you?’ Kaş. I 392; 10 o.o.: KB munıŋ şükrı emdi neteg öteyin ‘how am I now to proffer thanks for this?’ 390; emdi köŋlüŋ neteg ‘how are you feeling now?’ 523; a.o. 839: xii(?) KB VP neteg kim tiledi me boldı kamuğ ‘and everything came into existence as he wished’ 6; a.o. 22: xiii(?) Tef. neteg ‘how?; just as, as’ 228: xiv Muh. kayf nete: Mel. 17, 6; Rif. 95: Çağ. xv ff. nitek (‘with -k’) nice nesne (sic?) ‘how?; how’ (quotn.); netük nice (quotn.) Vel. 392-3; netek/netük (spelt) çih nahw wa çih gūna ‘in what way? how?’ San. 322r. 26 (quotns.): Xwar. xiii nete ‘Ali 17: xiv neteg ‘how?’ Qutb 114; MN 227.