menial, a. serving; low, servile.

mental, a. intellectual.

mentality, n. intellectuality.

mentor, n. monitor, counselor, guide.

mentorial, a. admonitory, monitory.

mercantile, a. trading, commercial.

mercenary, a. hired, hireling, purchased; greedy, sordid, avaricious, grasping.

mercenary, n. hireling.

merchandise, n. wares, goods, commodities.

merchant, n. trader, dealer, trafficker, shopkeeper, tradesman.

merchantable, a. salable, vendible, marketable.

merciful, a. pitiful, lenient, clement, compassionate, benignant, indulgent, kind, gracious, forgiving.

merciless, a. unmerciful, remorseless, cruel, pitiless, ruthless, inexorable, implacable.

Mercury, n.  Hermes; quicksilver; messenger.

Mercury’s staff. caduceus.

mercy, n. clemency, pity, lenity, leniency, lenience, compassion, forgiveness, placability; discretion, disposal; blessing, favor.  Antonyms:  revenge, implacability, inclemency, incompassion.

mercy seat. propitiatory.

merely, a. purely, absolutely; simply, barely, only.

merge, v. swallow up, absorb, immerse, take in; be swallowed up, be absorbed.

merger, n. absorption.

meridian, n. noon, midday; culmination, zenith, pinnacle, apex.  Antonym:  nadir.

meridian, a. midday, meridional.

merit, n. desert, worth, meed, worthiness; worth, excellence, goodness; reward; pl. claim, right.  Antonym:  demerit.

merit, v. deserve, earn.

brmeritorious, a. worthy, commendable, meedful, deserving.

merriment, n. mirth, gayety, glee, levity, laughter, sportiveness, jocularity.

merry, a. mirthful, gay, jolly, gleeful, jovial, sportive, jocular, bonny.

mesa, n. tableland, plateau.

mesh, n. net, network.

mess, n. rations, food; mixture, medley, farrago, litter, hodgepodge, jumble, melange.

message, n. communication, notice, word; telegram, despatch, cablegram.

messenger, n. courier, herald, forerunner, precursor, harbinger, mercury, emissary.

metaphor, n. simile.

meteor, n. fireball, shooting star; bolis, bolide.

meteoric stone. meteorite, aerolite.

methodical, a. systematic, orderly, methodic.  Antonyms:  immethodical, unsystematic.

meticulous, a. timid, fearful, diffident.

mettle, n. spirit, disposition; pluck, nerve, hardihood, stamina, spirit.

mettled, a. high-spirited, mettlesome, fiery, ardent.

mettlesome, a. spirited, mettled.

mew, v. moult.

mew, n. cage, coop; sea-mew, gull, cob.

miasma, n. malaria.

miaul, n. mew, caterwaul.

midbrain, n. mesencephalon.

midday, n. noon, meridian, noontide.

middle, a. mean, medial; intermediate, intervening.