Strong's numbers
ἄχρηστος (G890)
áchrēstos
akh'-race-tos
from Α (as a negative particle) and χρηστός; inefficient, i.e. (by implication) detrimental:--unprofitable.
Abbott–Smith
From G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), in the public domain.
1 occurrence
Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.
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Philemon 1:11
Which in time past was to thee unprofitable, but now profitable to thee and to me: