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Definition/Meaning

(adjective)

terrible, bad, hellish, miserable;

e.g. They had one hellacious management system that need a complete reboot.

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Similar Words

Acute

Almighty

Arduous

Backbreaking

Blistering

Bunyanesque

Cavernous

Challenging

Deep

Demanding

Difficult

Dreadful

Exacting

Excruciating

Explosive

Exquisite

Fearful

Fearsome

Ferocious

Fierce

Formidable

Frightful

Furious

Ghastly

Grueling

Hard

Heavy

Heavy-duty

Herculean

Intense

Intensive

Killer

Laborious

Moiling

Monolithic

Murderous

Profound

Rigorous

Rough

Rugged

Severe

Stiff

Strenuous

Stressful

Sweaty

Tall

Terrible

Testing

Toilsome

Tough

Uphill

Vehement

Vicious

Violent

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Opposite Words

Accessible

Clear

Diminished

Elementary

Feeble

Friendly

Gentle

Idiotproof

Manageable

Qualified

Relaxed

Shallow

Smooth

Soothing

Subdued

Superficial

Uncomplicated

User-friendly

Weak

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Related Words

Abstract

Abstruse

Aggravated

Annoying

Big

Biggish

Bothersome

Boxcar

Bruising

Brutal

Bulky

Burdensome

Complex

Complicated

Concentrated

Considerable

Cruel

Elusive

Exhaustive

Goodly

Grand

Great

Grievous

Grim

Hairy

Handsome

Harsh

Hefty

Hulking

Husky

Inhuman

Insoluble

Intricate

Involved

Irksome

Knotty

Labored

Large

Onerous

Opaque

Oppressive

Outsize

Oversize

Painful

Problematic

Recondite

Rigorous

Serious

Severe

Sizable

Spiny

Stressed

Stressful

Strict

Stringent

Stubborn

Substantial

Taxing

Thorny

Thorough

Ticklish

Tidy

Tight

Tricky

Troublesome

Trying

Vexatious

Voluminous

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