Calque of English biased, from ܣܸܛܪܵܐ (siṭrā, “side; bias”) + -ܝܐ (-āyā, the attributive adjective ending).
ܣܸܛܪܵܝܵܐ • (siṭrāyā) (feminine ܣܸܛܪܵܝܬܵܐ (siṭrāytā), plural ܣܸܛܪ̈ܵܝܹܐ (siṭrāyē))