ܦܽܘܪܕܳܫܳܐ pwrdšʾ purdāšā (perhaps to emend to ܦܘܪܣܫܢ pwrsšn) demonstration
LS does not give any etymon, but according to Müller 1894, 365 it is a mistake for pwrsšn, that is MP pursišn [pwrsšn] question (CPD 69); NP pursiš question, interrogation (Steingass 243). On the contrary, according to PS Comp. 439, the word is a derivative from the verbal root prdš to demonstrate, explain. But this root, if it really exists (it is not recorded in LS), would clearly be a denominal verb from pwrdšʾ ● BB 1562, 9 ◆ LS 594a; PS Comp. 439 and 458