- Original: ἀχάριστος - Transliteration: Acharistos - Phonetic: ach-ar'-is-tos - Definition: 1. ungracious a. unpleasing b. unthankful - Origin: from G1 (as a negative particle) and a presumed derivative of G5483 - TDNT entry: 15:12,1 - Part(s) of speech: Adjective - Strong's: From G1 (as a negative particle) and a presumed derivative of G5483 ; thankless that is ungrateful: - unthankful. Total KJV Occurrences: 1 • unthankful, 1 2 Timothy 3:2