ὀρίγανος
From LSJ
Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.
Russian (Dvoretsky)
ὀρίγᾰνος: (ῑ) ἡ бот. ориган, душица Arst.: ὀρίγανον βλέπειν Arph. глядеть, словно наевшись душицы, т. е. мрачно, сурово.