Strong’s Greek
G274 — amemptos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀμέμπτως
amemptos — pronounced am-emp'-toce
adverb from 273; faultlessly:--blameless, unblamably. see GREEK for 273
2 occurrences in the KJV.
1 Thessalonians 2:10
Ye are witnesses, and God also, how holily and justly and unblameably we behaved ourselves among you that believe:
1 Thessalonians 5:23
And the very God of peace sanctify you wholly; and I pray God your whole spirit and soul and body be preserved blameless unto the coming of our Lord Jesus Christ.