mercurial
adjective
[ məːˈkjʊərɪəl ]
• subject to sudden or unpredictable changes of mood or mind.
• "his mercurial temperament"
Similar:
volatile,
capricious,
temperamental,
excitable,
fickle,
changeable,
unpredictable,
variable,
protean,
mutable,
erratic,
quicksilver,
inconstant,
inconsistent,
unstable,
unsteady,
fluctuating,
ever-changing,
kaleidoscopic,
fluid,
wavering,
vacillating,
moody,
flighty,
wayward,
whimsical,
giddy,
impulsive,
labile,
• of or containing the element mercury.
• "gels containing organic mercurial compounds"
• of the planet Mercury.
mercurial
noun
• a drug or other compound containing mercury.
• "for twenty years organic mercurials were the most potent diuretics in clinical use"
Origin:
late Middle English (in mercurial (sense 3 of the adjective)): from Latin mercurialis ‘relating to the god Mercury’, from Mercurius ‘Mercury’. mercurial (sense 1 of the adjective) dates from the mid 17th century.
