Strong’s Greek
G84 — adelos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀδήλως
adelos — pronounced ad-ay'-loce
adverb from 82; uncertainly:--uncertainly. see GREEK for 82
1 occurrence in the KJV.
1 Corinthians 9:26
I therefore so run, not as uncertainly; so fight I, not as one that beateth the air: