nĕc-ŏpīnans (also separately, nĕc ŏpīnans), antis,
adj., not expecting, unaware (rare but class.), Ter. Heaut. 186: et necopinanti (tibi) mors ad caput accidit, Lucr. 3, 959 (Lachm., nec opinanti): Ariobarzanem necopinantem liberavi, Cic. Fam. 15, 4, 10; Phaedr. 5, 7, 8.—Hence, adv.: nĕcŏpīnanter , unexpectedly, unawares : necopinanter, ἀπροσδοκήτως, Gloss. Philox.