The suffix -ion (-tion, -sion)
Learn how we can use the (very useful and very common) suffix -ion to turn many English verbs into nouns. Click here to see more videos about prefixes and suffixes. The ion suffix video I have a question. If a word ends in -ion, what kind of word is it? It’s probably a noun, a thing. We often add -ion to verbs to create nouns. Competition. Persuasion. So compete is the verb. We add -ion