Hungarian Historical Phonology könnyű
könnyű 'light (adjective)'
First attestation/Old Hungarian data
[coming]
Important dialectal forms
[coming]
Uralic/Ugric/Pre-Hungarian reconstruction
Zhivlov 2016: 295, 298: PUg *kȣ̈nȣ̈γ 'light (adjective)'
MSzFE, UEW: PUg *kȣ̈nɜ 'light (a); leicht'
Status of the Ugric etymology
?
Loan etymology
None suggested
Cognates suggested in earlier research
UEW:
Khanty: East (J) kö̆nəγ, South (DN) kenə, North (O) kon < PKh *käṇəγ (Zhivlov 2016)
Mansi: South (TJ) küńkē·ś, East (KU) kiγnə, West (P) kinnə 'light' < PMs *kinγǟ (Zhivlov 2016)
Proto-Ob-Ugric: ?
Commentary
The Ugric etymology presented in UEW is supported by Zhivlov (2016: 295, 299), who notes that this is one of the words that show the regular conditioned development *kVnV > *kVṇ(V) in Hungarian and Khanty. Zhivlov reconstructs the word-final *γ to Proto-Ugric: in UEW it is assumed that the suffixal elements in Khanty, Mansi and Hungarian reflect different derivational suffixes.
Regarding the vocalism, Zhivlov follows UEW in reconstructing *ȣ̈ (any front-vowel). The uncertainty of the vowel-reconstruction makes the Proto-Ugric etymology uncertain, despite the regular consonant-correspondence. Hungarian ö points to Proto-Ugric *ü, but this does not fit the Khanty and Mansi evidence regularly. However, due to the divergent dialectal forms in Hungarian (kinnê, kenyid etc.) one cannot be certain whether ö is original here.
Conclusion
Due to the problems with the vowel-reconstruction, the Ugric etymology remains uncertain (even though the words certainly are somehow connected).
References
EWUng : 817, s.v. könnyű: Proto-Ugric
MSzFE: 372, s.v. könnyű: Proto-Ugric
UEW s.v. kȣ̈nɜ: Proto-Ugric Uralonet
Zhivlov 2016: 295, 299: Proto-Ugric