ἀ-μέμπτως,

adv. (ἄμεμπτος), [in LXX: Est.3:13 * ;]

blamelessly (Lft. Notes, 28, 89; MM, VGT, see word -ος): 1Th.2:10 3:13 WH mg. 5:23.†

(AS)

blamelessly