Hungarian Historical Phonology küzd
küzd 'kämpfen, ringen, streiten'
First attestation/Old Hungarian data
küszöd- 'kämpfen, ringen, streiten'
Important dialectal forms
[coming]
Uralic/Ugric/Pre-Hungarian reconstruction
(Disputed:)
UEW: *kȣ̈śɜ ‘competition, game; compete, play; Wettstreit, Spiel; wettstreiten, spielen‘
Status of the Ugric etymology
Unclear
Loan etymology
None suggested
Cognates suggested in earlier research
UEW:
Khanty: East (V) kĕs- 'laufen', South (DN) kĕs- 'laufen, wetteifern, um die Wette tun, um die Wette laufen', North (O) kȧ̆s- 'wetteifern, um die Wette laufen od. fahren od. rudern'
Mansi: North (N) kās- 'wettstreiten'
? Finnish: kisa 'Brunst, Laufzeit, Spiel, Lärm'
? Saami: North gižži 'brawl'
Commentary
UEW lists the etymology also among the Finno-Ugric lexemes, mentioning uncertain cognates from Finnic and Saami. According to UEW, it is semantically doubtful whether the Finnic and Saami cognates belong here. This is correct, but there are also phonological problems, as the words listed here cannot be derived regularly from the same Proto-Uralic form. The relationship Fi i ~ North Saami i is irregular, and neither Hungarian nor Mansi cognates point to *i regularly.
Even the vowel-relationship between the Hungarian, Khanty and Mansi words is irregular (UEW mentions that the correspondences are "nicht häufige"). Hungarian z is also irregular, but the archaic form küszöd might show the original sibilant, and z is due to assimilation caused by the following voiced d.
Conclusion
Due to irregular phonological relations, the reconstruction of a Proto-Ugric form appears unlikely.
References
UEW s.v. kȣ̈śɜ: PUg Uralonet