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strenuous

adjective

/ˈstrɛnjuəs/

Meaning

Requiring or using great effort and energy.

Climbing the mountain was a strenuous task.

arduous, exhausting, demanding, vigorous

easy, effortless, simple

strenuous exercise, strenuous effort, strenuous task

Having the potential to cause cancer in living tissue.

having won a victory; successful in a struggle or contest

not real or not present; lacking existence

having faults or defects; imperfect

Naturally accompanying or associated with something.

having qualities characteristic of a mother; caring and protective