formidable
adjective
[ ˈfɔːmɪdəb(ə)l ]
• inspiring fear or respect through being impressively large, powerful, intense, or capable.
• "a formidable opponent"
Similar:
intimidating,
forbidding,
redoubtable,
daunting,
alarming,
frightening,
terrifying,
petrifying,
horrifying,
chilling,
disturbing,
disquieting,
dreadful,
brooding,
awesome,
fearsome,
ominous,
foreboding,
sinister,
menacing,
mean-looking,
threatening,
dangerous,
spooky,
scary,
creepy,
direful,
bodeful,
onerous,
arduous,
taxing,
difficult,
hard,
heavy,
laborious,
burdensome,
strenuous,
vigorous,
back-breaking,
stiff,
uphill,
relentless,
Herculean,
monumental,
colossal,
demanding,
trying,
tough,
challenging,
exacting,
overwhelming,
exhausting,
wearying,
fatiguing,
tiring,
punishing,
gruelling,
grinding,
killing,
no picnic,
knackering,
toilsome,
exigent,
capable,
able,
proficient,
adept,
adroit,
accomplished,
impressive,
strong,
powerful,
mighty,
terrific,
tremendous,
great,
indomitable,
invincible,
seasoned,
skilful,
skilled,
gifted,
talented,
masterly,
virtuoso,
expert,
knowledgeable,
qualified,
trained,
efficient,
good,
excellent,
brilliant,
outstanding,
first-class,
first-rate,
mean,
wicked,
deadly,
nifty,
Origin:
late Middle English: from French, or from Latin formidabilis, from formidare ‘to fear’.