PS

*ˁrb/*γrb - to come in, to enter (Kogan 2015: 333;409)

The original meaning ‘to enter’ only in Akk. and Ugr. Elsewhere in WS, only derived meanings (such as ‘to set (sun)’ or ‘to stand surety’) are attested (HALOT 876, CDG 69). For MSA ‘strange, peculiar’ cf. also Tgr. ˁarba ‘something peculiar’ (WTS 460).

Akkadian
erebu - setting of the sun (CAD E 258)
Akkadian
erēbu - to come in, to enter (CAD E 259, AHw. 234)
Akkadian
erubātu - pledge (CAD E 327)
Ugaritic
ˁrb - sunset (DUL 183)
Ugaritic
ˁrb - to enter (DUL 179‒180)
Ugaritic is the only WS language where *ˁrb fully preserves its (presumably, original) status of the main exponent of the meaning “to enter.” (Kogan 2015: 333)
Ugaritic
ˁrb - to give a guarantee or pledge, stand surety for, leave a deposit (DUL 180)
Ugaritic
ˁrbn - guarantor, surety (DUL 183)
Samalian
ˁrb - to enter (KAI 215:18)
J. Tropper (1993a:126) reads w-hˁrb ˀby mn dmšḳ l-ˀšw[r] in KAI 215:18 and translates ‘Und er führte meinen Vater von Damaskus hinein nach Assu[r].’ If this reading is correct, Samalian would possess a verb ˁrb ‘to come in, to enter,’ cognate to Ugr. ˁrb and Akk. erēbu, but not attested in Aramaic. No certainty in this respect is possible, however: apart from the epigraphic difficulties, one may observe that neither Ugr. ˁrb nor Akk. erēbu are normally used with the prepositions meaning “from” (DUL 179‒180, CAD E 259‒273). Given the fact that Hbr. ˁbr with min is, conversely, well attested (HALOT 780, meaning 8), one may wonder whether the traditional reading hˁbr, still accepted in KAI5, is worth preserving (Kogan 2015:409).
Samalian
mˁrb - sunset (DNWSI 671)
Official Aramaic
mˁrb - sunset (DNWSI 671)
Syriac
maˁrəbā - sunset, west (LSyr. 546, SL 804)
Arabic
γrb - to go away, to depart; to hide, to disappear; to be foreign or obscure (Lane 2240)
Tigre
ˁarbä - to go astray, to get lost (WTS 460)
Tigrinya
ˁaräbä - to disappear, vanish; to be lost, to perish (TED 1847)
Mehri
γəráyb - peculiar, strange; stranger (ML 140)
Jibbali
γáríb - stranger (JL 88)
Harsusi
γeréb - strange (HL 45)