διαβάλλειν
ἀνὴρ ἀχάριστος μὴ νομιζέσθω φίλος → an ungrateful man should not be considered a friend
Greek > English (Woodhouse Verbs Reversed)
(see also διαβάλλω): abuse, cross, depreciate, disparage, slander, go over, pass, pick holes in, run down, speak evil of, bring a person into bad odour with, bring one into odium with, bring into bad odour with, bring into odium with
Lexicon Thucydideum
traiicere, to cross over, 2.83.3, 6.30.1,
traducere, perstringere, invidiam adducere, to lead across, disparage, stir up ill will, 2.18.3, 3.4.4, 3.42.2, 3.109.2, 4.27.4. 5.16.1, 5.45.1, 6.83.3. 7.48.3. 8.54.3, 8.54.38.86.3. 8.88.1,
PASS. in invidiam adduci, to incur ill will, 4.22.3, 5.16.1, 5.17.1, 5.46.4. 8.109.1, [plurimi codd. very many manuscripts αὐτοὺς, cf. Popp. adn. compare Poppo's note].
invidiam concipere, inimicum esse, to conceive envy, be hostile, 8.81.2, 8.83.1.