RootoryBefore or after?
A prefix appears before the base or root, as re- does in react. A suffix follows it, as -or does in actor. The hyphen marks an affix in a teaching label; it is not written inside the ordinary word.
Meaning and grammar work together
react is a verb expressing a response. actor is a noun for a performer, while active is an adjective. These examples show why you should record the whole word’s part of speech as well as its pieces.
Respect the surface form
Rootory displays action as act + -ion. The visible ending here is -ion; adding an extra t to act would not reproduce action. Look at the actual letters, not just a familiar suffix label.
Avoid one-rule translations
Not every prefix has one meaning in every word, and not every suffix changes the part of speech. Treat a split as a clue, then check a definition and a complete sentence.
Explore the words
react
respond to something
She reacted calmly when she heard the bad news.
actor
a performer in plays or films
The actor won an award for his role in the film.
active
doing things; full of energy
My grandmother is still very active at eighty.
action
the process of doing something
The team took quick action to fix the problem.
Try it yourself
Which word has a prefix before act: actor, active or react?
Show a suggested answer
react: re- comes before act. In actor and active, the additional parts come after act.
Examples come from Rootory’s AI-assisted vocabulary collection. Word splits are learning aids, not complete histories of how each word entered English.
