crucialon Academic Word Listalso onCEFR Upper intermediate (B2)? Academic Vocabulary List (AVL)? Band 2 (BND2)? حاسم crucial crucial(adjective) حاسم Crucial means extremely important. Wearing a seat belt in a car is crucial to your safety. crucially crucially(adverb) بشكل حاسم Forms adjectiveadverb crucial crucially 1 2