герметичный

From LSJ

ἔργον δὲ καλὸν οὔτε θεῖον οὔτ ̓ ἀνθρώπειον χωρὶς ἐμοῦ γίγνεται → there is no fine work of man or god without me

Source

Russian > Greek

ὑδασιστεγής, στεγανός