Strong’s Greek
G793 — asteriktos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀστήρικτος
asteriktos — pronounced as-tay'-rik-tos
from 1 (as a negative particle) and a presumed derivative of 4741; unfixed, i.e. (figuratively) vacillating:--unstable. see GREEK for 1 see GREEK for 4741
2 occurrences in the KJV.
2 Peter 2:14
Having eyes full of adultery, and that cannot cease from sin; beguiling unstable souls: an heart they have exercised with covetous practices; cursed children:
2 Peter 3:16
As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.