Lexical Definition

‎אַדְרַזְדָּא‎ ʼadrazdâʼ (ad-raz-daw') diligently ^A:Adv
(Aramaic) probably of Persian origin

diligently.

• quickly or carefully

1) correctly, exactly, diligently, earnestly

Brown-Driver-Briggs

Also see: אֲזָד

‎אַדְרַזְדָּא‎ adverb correctly, exactly (according to Haug^{JBW 1853, 152 f.} Scheft^{68 f.} from Zend derez, make firm, whence Sanskrit participle passive drdha, firm, sure, suitable, Zend dere´ta, holding firm, Persian durust, whole, complete, correct; > Nö^{KAT 2 617} from ‎אַזְדָּא‎, q. v.); — Ezra 7:23 ‎׳‎‎יִתְעֲבֵד א‎. ‎אֶדְרַע‎ see ‎דרע‎.

Brown-Driver-Briggs References