Strong’s Greek
G778 — askeo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀσκός
askeo — pronounced as-keh'-o
probably from the same as 4632; to elaborate, i.e. (figuratively) train (by implication, strive):--exercise. see GREEK for 4632
1 occurrence in the KJV.
Acts 24:16
And herein do I exercise myself, to have always a conscience void to offence toward God, and toward men.