Hungarian Historical Phonology foszlik
foszlik 'sich fasern, schleißen, sich auftrennen'
foszt '(Feder) schleißen; schälen, (Mais) abschälen'
First attestation/Old Hungarian data
? 1343 Fozlanch (EWUng: 414, s.v. foszlik)
Important dialectal forms
[coming]
Uralic/Ugric/Pre-Hungarian reconstruction
Disputed:
UEW: PU *puśɜ- ‘rag, dissolve, fray; etzen; sich zerfetzen, sich fasern‘
Status of the Ugric etymology
Implausible
Loan etymology
None suggested so far
Cognates suggested in earlier research
UEW:
Khanty: East (VK) ľopi̮ pośt 'abgenutztes (Ober)kleid'
Mansi: North (So) posl- 'sich zu einem Loch abnutzen (Hemd, Schuhzeug, metallenes Gefäß)
? Udmurt: pośt- 'abgetragen, abgenützt werden, sich zerfetzen, lumpig werden'
Commentary
UEW considers the etymology as a certain Proto-Ugric word with an uncertain cognate in Udmurt. The suggested Udmurt cognate pośt- is completely irregular and should be rejected. Also, the Ugric etymology involves various problems: Khanty ś is irregular, and East Khanty pośt cannot be a regular cognate to neither Hu foszlik nor North Mansi posl-. The Mansi word could technically be related to Hungarian fosz-, as North Mansi o can reflect earlier *u, the usual source of Hungarian o, but the semantic difference and the limited distribution of the word to one dialect only make the etymology problematic.
Conclusion
The Khanty cognate has to be rejected as irregular, and the relationship between Hu foszlik and Mansi posl- is improbable.
References
EWUng: 414, s.v. foszlik: PUg, ? PFU
UEW: PUg, ? PFU Uralonet