ἄπταιστοςáptaistos

Same root

• ΑA · G1the first letter of the alphabet; figuratively, only (from its use as a numeral) the first:
• πταίωptaíō · G4417to trip, i.e. (figuratively) to err, sin, fail (of salvation)

Where it appears

Appears 1 times in the Bible.

• Jude 1:24 Now all glory to God, who is able to keep you from falling away and will bring you with great joy into his glorious presence without a single fault.