assertanother word for 'say' meaning to state a fact confidently and forcefullyThe report asserts that renewable energy can fully replace fossil fuels within three decades.NoteThe report asserts that renewable energy can fully replace fossil fuels within three decades.Elon.io is an online learning platformWe have an entire course teaching IELTS Vocabulary — Band 7+ grammar and vocabulary.Start learning IELTS Vocabulary — Band 7+ now