MINDFUL—observant, attentive. (Heedless.)
MISCELLANEOUS—promiscuous, indiscriminate.
MISCHIEF—injury, harm, damage, hurt. (Benefit.)
MISCREANT—caitiff, villain, ruffian.
MISERABLE—unhappy, wretched, distressed, afflicted. (Happy.)
MISERLY—stingy, niggardly, avaricious, griping.
MISERY—wretchedness, woe, destitution, penury, privation, beggary. (Happiness.)
MISFORTUNE—calamity, disaster, mishap, catastrophe. (Good luck.)
MISS—omit, lose, fall, miscarry.
MITIGATE—alleviate, relieve, abate. (Aggravate.)