PS

*ŝVrš- - root (Kogan 2015:42)

This conventional reconstruction does not pretend to describe with full adequacy all the extant cognates. Problems connected with the reconstruction of the PS term for “root” are extensively discussed in Faber 1984:213‒219. (Kogan 2015:42, note 99)

Akkadian
šuršu - root, base, foundation (CAD Š₃ 363, AHw. 1286)
Ugaritic
šrš - root (DUL 845)
Hebrew
šōräš - root (HALOT 1659)
Jewish Palestinian Aramaic
šrš - root (DJPA 568)
The basic word for ‘root’ is ˁyḳr.
Syriac
šeršā - root (LSyr. 810, SL 1613)
The basic word for ‘root’ is ˁeḳḳārā.
Mandaic
širša - root (MD 463)
Maalula
šerša - Wurzel (GNDM 93)
Arabic
šarḫ- - origin, source, root (Lane 1531)
Arabic
širs- - small thorny trees (Lane 1532)
Arabic
šaras- - small thorny tree (Lane 1532)
Arabic
širš- - root (Dozy I 745)
Note 102: “One has to agree with Leslau (CDG 533) who believes that Arb. širš- ‘root’ (Dozy I 745) “does not give the impression of being an original Arabic root.” “
Sabaic
s₂rs₁ - base, foundation (SD 134)
Minaean
s₂rs₁ - base, foundation (LM 88)
Qatabanian
s₂rs₁ - base, foundation (LIQ 172)
Geez
ŝərw - root (CDG 535)
also throughout modern EthS
Tigre
sər - root (CDG 535)
Tigrinya
sur - root, vein, nerve, artery, muscle (TED 677)
Amharic
sər - root (AED 482)
Harari
sər - root (EDH 142)
Soddo
sər - root (EDG 558)
Mehri
ŝarḫ - wand; lopped, dressed branch (ML 385)
Jibbali
ŝírɔ́ḫ - root (JL 256)