Tigrinya

täṣäbbäyä - to wait; to await, to stand by; to persevere, to expect (TED 2580)

Probably related

PS
*ṣbw - to wish, to desire (Kogan 2015:95)

It similarly mirrors the semantic evolution of the PWS root *ptw ‘to desire’ (> Arb. fataⁿ ‘youth’).