Strong’s Greek
G66 — agrios
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἄγριος
agrios — pronounced ag'-ree-os
from 68; wild (as pertaining to the country), literally (natural) or figuratively (fierce):--wild, raging. see GREEK for 68
3 occurrences in the KJV.
Matthew 3:4
And the same John had his raiment of camel’s hair, and a leathern girdle about his loins; and his meat was locusts and wild honey.
Mark 1:6
And John was clothed with camel’s hair, and with a girdle of a skin about his loins; and he did eat locusts and wild honey;
Jude 1:13
Raging waves of the sea, foaming out their own shame; wandering stars, to whom is reserved the blackness of darkness for ever.