Strong’s Greek
G182 — akatastatos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀκατάστατος
akatastatos — pronounced ak-at-as'-tat-os
from 1 (as a negative particle) and a derivative of 2525; inconstant:--unstable. see GREEK for 1 see GREEK for 2525
1 occurrence in the KJV.
James 1:8
A double minded man is unstable in all his ways.