mi·na·cious (mĭ-nā'shəs) adj. Of a menacing or threatening nature; minatory.
[Latin mināx, mināc- (from minārī, to threaten, from minae, threats; see men-2 in Indo-European roots) + -ious.] mi·na'cious·ly adv., mi·na'cious·ness, mi·nac'i·ty (mĭ-nās'ĭ-tē) n.