needing a lot of effort or strength:
a strenuous climb
The doctor advised Ken to avoid strenuous exercise.
active and determined:
Sherry's been making a strenuous effort to lose weight.
—strenuously adverb:WORD FOCUS: difficult
Barrett strenuously denied rumors that he would resign.
difficult to do: hard, tough, challenging, daunting
difficult and needing a lot of physical effort: tough, strenuous, back-breaking, gruelling, arduous, punishing
difficult to deal with or talk about: tricky, awkward, delicate, sensitive, touchy
words for describing a difficult person: awkward, trying
words for describing difficult conditions: adverse, hostile
➔ See also difficult