Strong’s Greek
G255 — alusiteles
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀλυσιτελής
alusiteles — pronounced al-oo-sit-el-ace'
from 1 (as a negative particle) and the base of 3081; gainless, i.e. (by implication) pernicious:--unprofitable. see GREEK for 1 see GREEK for 3081
1 occurrence in the KJV.
Hebrews 13:17
Obey them that have the rule over you, and submit yourselves: for they watch for your souls, as they that must give account, that they may do it with joy, and not with grief: for that is unprofitable for you.