Sabaic

ˁlm - to make acknowledgment (SD 15)

Also: tˁlm ‘to take notice, cognizance,’ ˁlm ‘sign, mark’ (SD 15)

PCS
*ˁlm - (to) sign (Kogan 2015:40, note 94)
Contra HALOT 834, there is hardly any connection with Hbr. ˁlm ‘to be hidden, concealed.’