Tigrinya

səlä - owing to, for, because of; about, concerning, instead of, in place of; for the sake of (TED 618)

See Lipiński 1997:464.

PS
*ˀiš - to, for (Arakelova 2001:29)
The reconstruction is not entirely certain. Akk. iš is only attested in a specific group of texts (the archaic liver models from Mari); moreover, it is sometimes considered to be an equivalent of the terminative marker -iš. Throughout EthS this preposition can only be distinguished as a part of other prepositions, for which one may also suppose other ways of division. See Arakelova 2001:29–30.