κρυφαίως
From LSJ
ἐν δὲ τοῖς φυσικοῖς ἀεὶ οὕτως, ἂν μή τι ἐμποδίσῃ → in natural products the sequence is invariable, if there is no impediment | now with that which is natural it is always thus if there is no impediment
French (Bailly abrégé)
adv.
en cachette, en secret.
Étymologie: κρυφαῖος.
Russian (Dvoretsky)
κρῠφαίως: скрыто, тайно (δρασμὸν εὑρίσκειν τινά Aesch.).