Strong’s Greek
G888 — achreios
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀχρεῖος
achreios — pronounced akh-ri'-os
from 1 (as a negative particle) and a derivative of 5534 (compare 5532); useless, i.e. (euphemistically) unmeritorious:--unprofitable. see GREEK for 1 see GREEK for 5534 see GREEK for 5532
2 occurrences in the KJV.
Matthew 25:30
And cast ye the unprofitable servant into outer darkness: there shall be weeping and gnashing of teeth.
Luke 17:10
So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do.