From ܐܲܨܠܵܐ (origin) + -ܝܐ (-āyā, the attributive adjective ending).
ܐܲܨܠܵܝܵܐ • (aṣlāyā) (feminine ܐܲܨܠܵܝܬܵܐ (aṣlāytā), plural ܐܲܨܠܵܝܹ̈ܐ (aṣlāyē))