requiring great effort; characterized by effort to the point of exhaustion
Arduous in a sentence
The arduous climb took hours to complete successfully.
Synonyms for arduous
difficult
strenuous
taxing
Antonyms for arduous
easy
simple
effortless
Practice arduous on real SAT questions
Vocabulary like arduous appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.