P. and V. ἀπράγμων.
idle: P. and V. ῥᾴθυμος, ἀργός.
be apathetic, v.: P. ῥᾳθυμεῖν.
calm: P. and V. ἥσυχος, ἡσυχαῖος (Plato), P. ἡσύχιος.
dulled: P. and V. ἀμβλύς.