arduous

As adjectives the difference between arduous and elaborate

is that arduous is needing or using up much energy; testing powers of endurance while elaborate is highly complex, detailed, or sophisticated.

As a verb elaborate is

(used with'' on ''when used with an object ) to give further detail or explanation (about).

As adjectives the difference between arduous and tired

is that arduous is needing or using up much energy; testing powers of endurance while tired is in need of some rest or sleep.

As a verb tired is

(tire).

As adjectives the difference between conscientious and arduous

is that conscientious is thorough, careful, or vigilant; implies a desire to do a task well while arduous is needing or using up much energy; testing powers of endurance.

As adjectives the difference between arduous and effortful

is that arduous is needing or using up much energy; testing powers of endurance while effortful is requiring or showing effort.

As adjectives the difference between arduous and undefined

is that arduous is needing or using up much energy; testing powers of endurance while undefined is lacking a definition or value.

As adjectives the difference between arduous and audacious

is that arduous is needing or using up much energy; testing powers of endurance while audacious is showing willingness to take bold risks; recklessly daring.

As adjectives the difference between arduous and unconventional

is that arduous is needing or using up much energy; testing powers of endurance while unconventional is not adhering to convention or accepted standards.

As a noun unconventional is

something or someone that is unconventional.

As adjectives the difference between arduous and overloaded

is that arduous is needing or using up much energy; testing powers of endurance while overloaded is loaded too heavily.

As a verb overloaded is

past tense of overload.

As adjectives the difference between arduous and exhausted

is that arduous is needing or using up much energy; testing powers of endurance while exhausted is depleted; in a state of exhaustion.

As a verb exhausted is

(exhaust).

Unfeeling is a related term of arduous.

As adjectives the difference between unfeeling and arduous

is that unfeeling is without emotion or sympathy while arduous is needing or using up much energy; testing powers of endurance.