mercurially
In capricious fashion
In a manner characterized by rapid, unpredictable changes of mood or mind.
Someone who behaves mercurially shifts quickly between states—cheerful one moment, irritable the next: He responded mercurially to criticism, sometimes laughing it off, sometimes storming out.
The word derives from Mercury, the swift and changeable Roman messenger god.
Subject to sudden changes
- volatileLiable to sudden change
- temperamentalEasily upset, unpredictable
- moodyProne to sullenness
- changeableCapable of alteration
erratic · whimsical · unpredictable · impulsive · fickle · inconstant · flighty · quicksilver
Shifting irregularly over time
- variableProne to fluctuation
- shiftingChanging position or form
- mutableAble to be changed
- proteanReadily changing form
chameleonic · transient · impermanent · inconsistent · irregular · unsteady · sporadic · fitful
At high speed
agilely · deftly · fleet-footed · sprightly · lively · briskly · hastily · suddenly
Fast at thinking
- cleverShowing mental quickness
- sharpFine-edged, or astute
- brilliantIntensely bright or gifted
- sparklingEmitting small bright flashes
silver-tongued · glib · facile · dazzling · scintillating · effervescent · vivacious · animated
capricious
Subject to sudden changes
- volatileLiable to sudden change
- temperamentalEasily upset, unpredictable
- moodyProne to sullenness
changeable · erratic · whimsical · unpredictable · impulsive · fickle · inconstant · flighty · quicksilver · unstable
fluctuating
Shifting irregularly over time
protean · chameleonic · transient · impermanent · inconsistent · irregular · unsteady · sporadic · fitful · kaleidoscopic
quickly
At high speed
nimbly · agilely · deftly · fleet-footed · sprightly · lively · briskly · hastily · suddenly · instantaneously
quick-witted
Fast at thinking
sparkling · silver-tongued · glib · facile · dazzling · scintillating · effervescent · vivacious · animated · spirited
mercuriallysteadily
In constant, unwavering fashion
constantly · consistently · unchangingly · stably · evenly
mercuriallysteadily
In constant, unwavering fashion
consistently · placidly · calmly · equably · stably
mercuriallypredictably
In an expected manner
reliably · dependably · faithfully · regularly · methodically