calm: P. and V. ἥσυχος, ἡσυχαῖος, P. ἡσύχιος.
resolute: P. and V. καρτερός, P. ἰσχυρός, V. ἔμπεδος.
dull, stupid: P. and V. νωθής, ἀμαθής, ἀφυής, P. ἀναίσθητος.