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Semitic Etymological Database
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Biblical Aramaic
hwy - to be, to happen, to exist
(HALOT 1858)
Reconstruction
PS
*hwy
- to be
(Kogan 2015:399)
As pointed out by J. Tropper (1993a:280), “in dieser Bed. und mit w als zweitem Radikal ausschliesslich aram.” The Hebrew form with y (hāyā, HALOT 241) is probably an innovation.