Greek word
áptaistos
ἄπταιστος
What it means
not stumbling, i.e. without sin
not stumbling, i.e. (figuratively) without sin
Where it comes from
from A (Α) (as a negative particle) and a derivative of ptaíō (πταίω)
How the King James translates it
Every place it appears 1
Jude1:24