פֿרירן
געפֿרוירן/געפֿראָרן
'to freeze'

ETYMOLOGY

[Why the alternative past participles with /o/ or /oj/? The /o/ may reflect MHG gevrorn when the root syllable was closed.]
Herzog writes that the alternation [gefrojrn/gefrejrn] is typical of vowel 42 (MHG vrœren, past participle gevrœrt 'to cause to freeze'), while [gefrorn] suggests vowel 41 (/o/ in a closed syllable). He concludes that there was a merger in Yiddish of the transitive and intransitive forms of the verb (MHG vriesen, p.p. gevrorn and vrœrn, p.p.gevrœrt) and that, though the final nasal constitutes a separate syllable in Yiddish, it most sometimes be considered, historically, as syllable closing. [Almost certainly so in WY and in earlier periods of the language.]

ON frjósa, OE frēosan, English to freeze, Dutch vriezen, (past participle) gevroren, OHG friosan, (past participle) gifroren, MHG vriesen, (past participle) gevrorn, NHG frieren; from PGmc ✱freusan- 'to freeze' (or ✱freusa-, or ✱frews-) (with Verner alternation ✱freusan-, (past participle) ✱fruzana-) < ✱préus-e- (WEUR) (or ✱preu̯s-). (Kluge/Seebold thinks ✱freusa- originally meant 'to spray', from a PIE root ✱preus-.)
The original past participle was ✱frusta- < ✱prus-to- (see פֿראָסט).
Perhaps related Latin pruīna 'frost', Sanskrit pruṣvā́- 'dew drop',

WESTERN

Oyberland (West Transcarpathian)

gəfrīən געפֿריִען {WTCP, SOUTHWESTERN HUNGARY, Garvin 1965: 99}

gəfroˑrn, gəfroːrn געפֿראָרן {WTCP, Dunajská Streda, 47179}

gəfroˑrn {WTCP, Vác, 47197}

gəfrúərn, gʲəfrúˑrn {WTCP, Berettyó-Újfalu, 47212}

gəfruərn {WTCP, Hajdúhadház, 47219}

CENTRAL

Unterland (East Transcarpathian)

gəfrurn געפֿראָרן {ETCP, U. Weinreich 1964: 261}

gα/əfruːrn געפֿרוירן {ETCP, Teiuș, 46233}

gəfruərn געפֿרוירן {ETCP, Sîg Felső Szek, 47223}

gəfruˑrn געפֿרוירן {ETCP, Mănăștur 47236}

friˑrt {ETCP, Bistriţa, 47241}
- gəfruˑrn געפֿרוירן

gəfruˑrn געפֿראָרן {ETCP, Mukachevo, 48226}

sə vert gəfrojrn סע ווערט געפֿרוירן {ETCP, Nyzhnya Apsha, 48233}

gɩfʀójʀŋ געפֿרוירן {POLAND, Wolbrom, 50196}

frɔst, vus-mɛ-i giɛfrɔjrn giɛvɔrn... dɛ dɔjtʃ'n zɛnɛ gɛfrɔjir gɛvɔrn ᵻn rusɬant פֿראָסט וואָס מע איז געפֿרוירן געוואָרן... די דײַטשן זענען געפֿרוירן געוואָרן אין רוסלאַנד {Warsaw, Geller 2001: 313}
gəfrorjŋ געפֿרוירן {POLAND, Warsaw, 52211}