оптическийopticus [a, um];
простужатьсяperfrigescere [o, frixi,-];
неустойчивыйinstabilis [e];inconstans
problema, atis, n; quaestio [onis, f] ; pensum [i, n] ; opus [eris, n] propositum; munus [e]ris, n; onus [e]ris, n;