ἀκουστέος

From LSJ

ο φίλος τον φίλον εν πόνοις και κινδύνοις ου λείπει → a friend does not abandon his friend in difficulties and in danger, a friend in need is a friend indeed

Source

French (Bailly abrégé)

α, ον :
adj. verb. de ἀκούω.

Russian (Dvoretsky)

ἀκουστέος: adj. verb. к ἀκούω.