capricious
adjective
[ kəˈprɪʃəs ]
• given to sudden and unaccountable changes of mood or behaviour.
• "it's terrible to feel our livelihood hinges on a capricious boss"
Similar:
fickle,
inconstant,
changeable,
variable,
unstable,
mercurial,
volatile,
erratic,
vacillating,
irregular,
inconsistent,
fitful,
arbitrary,
impulsive,
temperamental,
wild,
ungovernable,
whimsical,
fanciful,
flighty,
wayward,
quirky,
faddish,
freakish,
unpredictable,
random,
chance,
haphazard,
Origin:
early 17th century: from French capricieux, from Italian (see capriccioso).
