незаметный
From LSJ
Ἐρωτώμενος διὰ τί ὀλίγους ἔχει μαθητάς, ἔφη ὅτι ἀργυρέᾳ αὐτοὺς ἐκβάλλω ῥάβδῳ → When asked why he had so few pupils, he replied ‘I chase them away with a silver stick (Diogenes Laertius 6.4.5, on the philosopher Antisthenes)
Russian > Greek
ἄδηλος, ἀναίσθητος, βαιός, ἀνύποπτος, ἀθεώρητος, ἀείδελος, ἀσυμφανής, ἀσύνοπτος, ἀόρατος, ἄσκεπτος, ἀνεπαίσθητος, ἀδιάγνωστος, ἀφανής