ἀχρεῖοςachreîos

Same root

• ΑA · G1the first letter of the alphabet; figuratively, only (from its use as a numeral) the first:
• χρήchrḗ · G5534it needs (must or should) be
• χρείαchreía · G5532employment, i.e. an affair; also (by implication) occasion, demand, requirement or destitution
• ἀχρειόωachreióō · G889to render useless, i.e. spoil

Where it appears

Appears 2 times in the Bible.

• Matthew 25:30 Now throw this useless servant into outer darkness, where there will be weeping and gnashing of teeth.’
• Luke 17:10 In the same way, when you obey me you should say, ‘We are unworthy servants who have simply done our duty.’”