Strong’s Greek
G858 — aphelotes
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀφελότης
aphelotes — pronounced af-el-ot'-ace
from a compound of 1 (as a negative particle) and phellos (in the sense of a stone as stubbing the foot); smoothness, i.e. (figuratively) simplicity:--singleness. see GREEK for 1
1 occurrence in the KJV.
Acts 2:46
And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart,