arduous

Distressing is a related term of arduous.

As adjectives the difference between distressing and arduous

is that distressing is causing distress; upsetting while arduous is needing or using up much energy; testing powers of endurance.

As a verb distressing

is .

Arduous is a related term of harsh.

As adjectives the difference between arduous and harsh

is that arduous is needing or using up much energy; testing powers of endurance while harsh is unpleasantly rough to the touch or other senses.

As a verb harsh is

(slang) to negatively criticize.

As adjectives the difference between severe and arduous

is that severe is very bad or intense while arduous is needing or using up much energy; testing powers of endurance.

As adjectives the difference between picky and arduous

is that picky is fussy; particular; demanding to have things just right while arduous is needing or using up much energy; testing powers of endurance.

As a noun picky

is (informal) a picture.

Strenous is likely misspelled.

Strenous has no English definition.

As an adjective arduous

is needing or using up much energy; testing powers of endurance.

As adjectives the difference between herculean and arduous

is that herculean is of extraordinary might, power, size, etc.; of or relating to Hercules in size or strength while arduous is needing or using up much energy; testing powers of endurance.

Arduous is a related term of cryptic.

As adjectives the difference between arduous and cryptic

is that arduous is needing or using up much energy; testing powers of endurance while cryptic is having hidden meaning.

As a noun cryptic is

(informal) a cryptic crossword.

Arduous is a related term of unfathomable.

As adjectives the difference between arduous and unfathomable

is that arduous is needing or using up much energy; testing powers of endurance while unfathomable is impossible to fathom or understand; incomprehensible.

Arduous is a related term of wearying.

As an adjective arduous

is needing or using up much energy; testing powers of endurance.

As a verb wearying is

.

Arduous is a related term of perplexing.

As adjectives the difference between arduous and perplexing

is that arduous is needing or using up much energy; testing powers of endurance while perplexing is confusing or puzzling.

As a verb perplexing is

.