hellacious
Remarkably severe, unpleasant
Hellacious is slang for extreme or overwhelming, usually in a negative sense: a hellacious commute, hellacious traffic, a hellacious hangover.
It can also express grudging admiration for something impressively intense: She threw a hellacious punch.
The word blends hell with a Latin-style suffix, giving informal speech a mock-grandiose edge.
Extreme in degree
- severeExtremely harsh or strict
- fierceViolently intense or aggressive
- extremeFurthest from moderate
- overwhelmingIntensely excessive in force
brutal · punishing · grueling · savage · vicious · ferocious · relentless · harsh
Demanding strenuous effort
- exhaustingDepleting one's stamina
- gruelingExtremely tiring and demanding
- demandingRequiring great effort
- challengingHard to accomplish
tough · backbreaking · taxing · laborious · strenuous · onerous · burdensome · toilsome
Inspiring terror or alarm
- horrificExtremely shocking and dreadful
- nightmarishFrightening like bad dreams
- dreadfulCausing great fear or suffering
- ghoulishFascinated by death grotesquely
macabre · spine-chilling · sinister · menacing · harrowing · horrifying · blood-curdling · hair-raising
Causing great wonder
- incredibleDefying easy belief
- phenomenalExceptionally impressive or unusual
- spectacularStrikingly impressive to behold
- stupendousOverwhelmingly impressive
fantastic · awesome · remarkable · astonishing · mind-blowing · jaw-dropping · insane · wild
intense
Extreme in degree
overwhelming · brutal · punishing · grueling · savage · vicious · ferocious · relentless · harsh · merciless
arduous
Demanding strenuous effort
- exhaustingDepleting one's stamina
- gruelingExtremely tiring and demanding
- demandingRequiring great effort
challenging · tough · backbreaking · taxing · laborious · strenuous · onerous · burdensome · toilsome · painstaking
frightening
Inspiring terror or alarm
- horrificExtremely shocking and dreadful
- nightmarishFrightening like bad dreams
- dreadfulCausing great fear or suffering
ghoulish · macabre · spine-chilling · sinister · menacing · harrowing · horrifying · blood-curdling · hair-raising · chilling
amazing
Causing great wonder
- incredibleDefying easy belief
- phenomenalExceptionally impressive or unusual
- spectacularStrikingly impressive to behold
stupendous · fantastic · awesome · remarkable · astonishing · mind-blowing · jaw-dropping · insane · wild · wicked
heck
Mild frustrated exclamation
thunderstorm
Violent weather with lightning
- tempestViolent windstorm or turmoil
- hurricaneViolent tropical windstorm
- tornadoViolent rotating windstorm
cyclone · typhoon · monsoon · gale · blizzard · deluge · torrential · squall · violent · raging
hellaciouspleasant
Giving enjoyment or comfort
heavenly · delightful · wonderful · enjoyable · agreeable
hellaciouseasy
Requiring minimal effort
effortless · simple · painless · manageable · undemanding