Biblical Aramaic

hwy - to be, to happen, to exist (HALOT 1858)

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.