Word Explorer

Arduous

/ˈɑːdjuːəs/

Needing or using up much energy; testing powers of endurance.

📖 Definitions of "Arduous"

adjective

1
Needing or using up much energy; testing powers of endurance.
"The movement towards a peaceful settlement has been a long and arduous political struggle."
2
Burning; ardent
3
Difficult or exhausting to traverse.

13 synonyms found via WordNet and Google Books.

Word	Definition
heavynoun	(of any physical thing) Having great weight.
hardnoun	(of material or fluid) Solid and firm.
difficultverb	Hard, not easy, requiring much effort.
gruelingnoun	Alternative spelling of gruelling. [Very difficult or taxing; exhausting; backbreaking.]
effortful	Requiring or showing effort.
gruellingnoun	Very difficult or taxing; exhausting; backbreaking.
strenuous	(of a task) Requiring great exertion; very laborious.
laborious	Requiring much physical effort; toilsome.
strainingnoun	The act by which one strains. (muscles, etc)
toilsome	Requiring continuous physical effort; laborious.
punishingnoun	That punishes physically and/or mentally; arduous, gruelling, demanding.
labourious	Obsolete form of laborious. [Requiring much physical effort; toilsome.]
backbreaking	(figuratively) Of work, very physically tiring.

Found via reverse dictionary — words that share a conceptual meaning.

Word	Definition
laborious	Requiring much physical effort; toilsome.
toilsome	Requiring continuous physical effort; laborious.
backbreaking	(figuratively) Of work, very physically tiring.
labourious	Obsolete form of laborious. [Requiring much physical effort; toilsome.]
gruelling	Very difficult or taxing; exhausting; backbreaking.
punishingverb	That punishes physically and/or mentally; arduous, gruelling, demanding.
difficult	Hard, not easy, requiring much effort.
effortful	Requiring or showing effort.
hard	(of material or fluid) Solid and firm.
strainingnoun	The act by which one strains. (muscles, etc)
strenuous	(of a task) Requiring great exertion; very laborious.
grueling	Alternative spelling of gruelling. [Very difficult or taxing; exhausting; backbreaking.]
heavy	(of any physical thing) Having great weight.
demandingverb	Making great demands in terms of quality, quantity, accuracy or other criteria; difficult to satisfy.
labouredverb	Expressive of strenuous effort.
burdensome	Characteristic of a burden; arduous or demanding
cumbersome	Not easily managed or handled; awkward; clumsy.
challenging	Difficult, hard to do.
onerous	Imposing or constituting a physical, mental, or figurative load which can be borne only with effort; burdensome.
difficultynoun	The state of being difficult, or hard to do.