Pronunciation IPA (key): /əl/ or [l̩] or [ɫ̩] Audio (UK)(file) Suffix Suffix-al -al is added to words, usually nouns, to form an adjective. cranium + -al = cranial -al is added to an action verb to form a noun. propose + -al = proposal deny + -al = denial Wikiwand - on Seamless Wikipedia browsing. On steroids.