PNWS

*ṣmḫ - to sprout (Kogan 2015:238)

Cf. perhaps Arb. ˀimraˀat- ṣamiḫat- = γaḍḍat-

Ugaritic
ṣmḫ - to sprout, grow, prosper, flourish (DUL 785)
The only attestation of the Ugaritic verb (KTU 7.63:9) is rather unreliable.
Hebrew
ṣmḥ - to sprout, produce (HALOT 1033)
Syriac
ṣmḥ - to shine, to sprout forth (LSyr. 631, SL 1292)