mercurial

adj. 善变的，活泼的

menu, MEP, mephistophelean, mercantile, mercantile marine, Mercator's projection, Mercedes, mercenary, mercerize, mercerise, merchandise, merchandising, merchant, merchant bank, merchant marine, merchant navy, merchant seaman, merchant ship, merchant shipping, merciful, mercifully, merciless, mercilessly, Mercury, mercy, mercy killing, mere, merely, meretricious, meretriciously, meretriciousness, merge, merger, meridian, meridiem, meridional, meringue, merino, merit, merited, meritocracy, meritorious, meritoriously,