Strong's G830 — αὐθαίρετος (adjective)
authairetos (au-thai'-ret-os) adj.
1. self-chosen
2. (by implication) voluntary
[from G846 and the same as G140]
KJV: of own accord, willing of self 
Root(s): G846, G140 
Hebrew root: αἱρετίζω
Occurrences: 2