Strong’s Greek
G77 — adapanos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀδάπανος
adapanos — pronounced ad-ap'-an-os
from 1 (as negative particle); and 1160; costless, i.e. gratuitous:--without expense. see GREEK for 1 see GREEK for 1160
1 occurrence in the KJV.
1 Corinthians 9:18
What is my reward then? Verily that, when I preach the gospel, I may make the gospel of Christ without charge, that I abuse not my power in the gospel.