From Aramaic בְּשִׁילָא (bšīlā), equivalent to the passive participle of ܒܵܫܹܠ (bāšēl); compare Hebrew מְבֻשָּׁל (mevushál).
ܒܫܝܼܠܵܐ • (bšīlā) (feminine ܒܫܝܼܠܬܵܐ (bšīltā), plural ܒܫܝܼܠܹ̈ܐ (bšīlē))