איז
'is; so'

ETYMOLOGY

I. Proto-Yiddish ✱is; Proto-EY ✱iz; from MHG ist; cf. NHG ist.
Protovowel I1.
II. MHG ist; from OHG ist.
III. The verb 'to be' in Germanic languages is suppletive, combining forms from three different PIE verbs. The form איז (MHG  ist) is from PIE root ✱es- 'to be'.

WESTERN

Alsace (France)

ɩš {ALSACE, 47075 Mulhouse 007-040}

Switzerland

meŋsmol iʃ kʰumən ə kʰelblə də(r)tsuː מאַנכמאָל איז געקומען אַ קעלבלע דערצו {Endingen, Gustav Dreifuss, Fleischer 2005:83}

CENTRAL

ᵻz dus ɔt-mᵻn giɛtsɔjgɲ איז דאָס האָט מען געצויגן {Warsaw, Geller 2001: 177}