ο λύκος κι αν εγέρασε κι άσπρισε το μαλλί του, μήτε τη γνώμη άλλαξε, μήτε την κεφαλή του

Etymology
,, εγέρασε, past tense of ,  past tense of , , ,  past tense of , :

Proverb
(Even though the wolf got old and his hair became white, he changed neither his opinion nor his head)


 * 1)  the wolf may lose his teeth but never his nature; the fox may grow grey but never good; a leopard cannot change its spots one's nature cannot change no matter how much time passes