σιγᾶν ἄμεινον ἢ λαλεῖν ἃ μὴ πρέπει → it's better to keep silence than to say what's not appropriate (Menander)
P. and V. ἔντονος, σύντονος, ὀξύς, πρόθυμος, σπουδαῖος, δραστήριος, P. σφοδρός.
strong, intense: P. ἰσχυρός.
