Strong's #679: aptaistos (pronounced ap-tah'-ee-stos)
from 1 (as a negative particle) and a derivative of 4417; not stumbling, i.e. (figuratively) without sin:--from falling.
Thayer's Greek Lexicon:
̓́
aptaistos
1) not stumbling, standing firm, exempt from falling
Part of Speech: adjective
Relation: from G1 (as a negative particle) and a derivative of G4417
Usage:
This word is used 1 times:
Jude 1:24: "unto him that is able to keep you from falling, and to present you faultless before the presence"