PS

*ḳayŝ- - forest, wood (Fronzaroli 1969a: 277, 290; Kogan 2011: 200; Kogan 2012: 230)

Akkadian
ḳīštu - forest, wood (CAD Q 272, AHw. 923)
Though not bein attested before OB period this word has a transparent correspondence in Ebla: ḳá-sa-tum.
Ebla
ḳá-sa-tum - wood, forest (VE 400; Krebernik 1983: 15)
equated with Sum. GIŠ.TIR
Jewish Palestinian Aramaic
ḳīs - wood, timber (DJPA 491)
Jewish Babylonian Aramaic
ḳinsā, ḳissā - wood, twig (DJBA 1014)
Syriac
ḳaysā - wood, timber (LSyr. 665, SL 1364)
Turoyo
ḳayso - Holz, Stock (wood, stick) (RW 393)
Mehri
ḳəŝnīt - wood, forest (ML 242)
Soqotri
di-ḳáŝen - thief (LS 388; CSOL I 596)