Abbott-Smith Manual Greek Lexicon
ἀχάριστος (G884)
2 ** ἀχάριστος , -ον ( χαρίζομαι ), [in LXX: Wi 16:29 , Si 29:17 , 25 , IV Mac 9:10 *;] ungracious , unpleasing ; ungrateful , thankless : Lk 6:35 , II Ti 3:2 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain