Strong’s Greek
G74 — agonia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀγωνία
agonia — pronounced ag-o-nee'-ah
from 73; a struggle (properly, the state), i.e. (figuratively) anguish:--agony. see GREEK for 73
1 occurrence in the KJV.
Luke 22:44
And being in an agony he prayed more earnestly: and his sweat was as it were great drops of blood falling down to the ground.