This root form (lemma) is used in 2 different forms in the NT: ἀχάριστοι (NMP), ἀχαρίστους (AMP).
It is glossed in 1 way: ‘ungrateful’.
OET LUKE 6:35 Greek word=ἀχαρίστους (aⱪaristous) Morphology=AMP English gloss=‘ungrateful’ SR GNT LUKE 6:35 word 36
OET 2TIM 3:2 Greek word=ἀχάριστοι (aⱪaristoi) Morphology=NMP English gloss=‘ungrateful’ SR GNT 2TIM 3:2 word 13