погружаться в сон

From LSJ

ὁ μὴ πεπλευκὼς οὐδὲν ἑόρακεν κακόν → anyone who hasn't sailed has never seen trouble

Source

Russian > Greek

καταδαρθάνω, ἀποδαρθάνω, ἐπικαταδαρθάνω