Strong's G512 — ἀνωφελής (adjective)
anopheles (an-o-fel-ace') adj.
1. useless
2. (neuter) inutility
[from G1 (as a negative particle) and the base of G5624]
KJV: unprofitable(-ness) 
Root(s): G1, G5624 
Hebrew root: ὠφέλιμος
Occurrences: 2