mercurial (a)
protean/enthusiastic
resplendent (a)
magnificent = splendid
thwart (v)
prevent = ward off
irresolute (a)
indecisive = wavering
jeopardize (v)
endanger = imperil
malinger (v)
feign illness = dodge
lugubrious (a)
mournful = doleful
hubris (n)
haughtiness = arrogance
iconoclast (n)
nonbeliever = atheist
debunk (v)
expose = discredit
assuage (v)
alleviate = dampen
instigate (v)
start = set off
kindle (v)
ignite = spark
soporific (a)
causing sleep