impenetrable
From LSJ
πέτρην κοιλαίνει ρανὶς ὕδατος ἐνδελεχείῃ → constant dropping wears away a stone, constant dripping will wear away the hardest stone, little strokes fell big oaks, constant dripping wears the stone, constant dropping wears the stone, constant dripping will wear away a stone
English > Greek (Woodhouse)
adjective
inaccessible: ἄβατος (Xen.), P. δύσβατος, δυσπρόσοδος.
lying in an impenetrable forest: V. ἐν ὕλῃ κείμενος δυσευρέτῳ (Eur., Bacchae 1221).
undiscoverable: P. and V. ἀσαφής, ἀφανής, ἄδηλος, V. δυσεύρετος, δυστέκμαρτος, ἀξύμβλητος, δυσμαθής; see also secret.
Spanish > Greek
ἀμβλωπός, δυσέμβατος, δυσπρόσοδος, δυσδίοδος, δυσεύρετος, δύσρηκτος, δυσπάροδος, ἀπέρατος, ἀτόρητος, ἀδιάτμητος, ἄβατος, ἀπείριτος, ἄνικτον, ἀδαής, ἄρρηκτος, ἄσκοπος