οὐκ ἔστι γῆρας τοῦδε τοῦ μιάσματος → that pollution never wears out, that pollution can never grow old
P. and V. προθύμως, σπουδῇ, σφόδρα, P. σπουδαίως, ἐντόνως, συντόνως.
strongly: P. ἰσχυρῶς.