Terminology for a word containing a prefix/suffix or neither

prefixes suffixes affixes

This is an addition to @user2655010's answer as I don't have commenting privileges

According to this definition a root is a morpheme that underlies an inflectional or derivational paradigm.

And since a morpheme is: any of the minimal grammatical units of a language, each constituting a word or meaningful part of a word, that cannot be divided into smaller independent grammatical parts then a root would not contain another word or affix

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