малодушный
From LSJ
νᾶφε καὶ μέμνασο ἀπιστεῖν → keep a clear head and remember not to believe a thing (Epicharmus fr. 250)
Russian > Greek
ἄνανδρος, ἀκήριος, ἄψυχος, ἄσπλαγχνος, μικρόψυχος, ὀλιγόψυχος, μαλακός, ταπεινόφρων, βαρύψυχος, ἄθυμος, πονηρός, κακόσπλαγχνος, πέπων