root is the part of a word that cannot be changed, and when added to creates different forms of the word:
"Walk" is a root, and can be changed in many ways: walking, walked, walker, walkie-talkie, sidewalk, walk-light, walks etc. You will never have a word related to walking where the "walk" part gets changed, so it is a root.
Most of the time the root forms a word on its own, but sometimes they do not.
complete, replete, expletive: these all have the root "plete", which happens to not be a word on its own.
A stem is the form of a word that inflections get added onto. Most of the time this will be the root. "Walk" is the form that all the inflections (grammar-affecting changes) gets added to, when you add ~ing to it, it turns into a progressive verb or a gerund. ~ed turns it perfect. ~s makes it a plural noun, or makes it agree with a singular subject.
A base is any part of a word that you can add inflections to, or that you can add prefixes/suffixes that change the meaning/part of speech. So "walk" is also a base, because it can have inflections (walking) and can be turned into different words (walker is a noun). Walker is also a base, because you can modify it inflectionally (walkers is plural), and because it can have things added to derive new words (dog-walker).
So all roots are bases because they are the smallest chunk that stays the same despite additions.
Not all bases are roots though, because sometimes the root+inflection or root+derivation goes on to take additional changes. (Walker is a base, but the root is still walk).
Stems are just bases when you are talking about inflectional changes (-ed, -ing, -s, etc.).
root is the part of a word that cannot be changed, and when added to creates different forms of the word:"Walk" is a root, and can be changed in many ways: walking, walked, walker, walkie-talkie, sidewalk, walk-light, walks etc. You will never have a word related to walking where the "walk" part gets changed, so it is a root.Most of the time the root forms a word on its own, but sometimes they do not.complete, replete, expletive: these all have the root "plete", which happens to not be a word on its own.A stem is the form of a word that inflections get added onto. Most of the time this will be the root. "Walk" is the form that all the inflections (grammar-affecting changes) gets added to, when you add ~ing to it, it turns into a progressive verb or a gerund. ~ed turns it perfect. ~s makes it a plural noun, or makes it agree with a singular subject.A base is any part of a word that you can add inflections to, or that you can add prefixes/suffixes that change the meaning/part of speech. So "walk" is also a base, because it can have inflections (walking) and can be turned into different words (walker is a noun). Walker is also a base, because you can modify it inflectionally (walkers is plural), and because it can have things added to derive new words (dog-walker).So all roots are bases because they are the smallest chunk that stays the same despite additions.Not all bases are roots though, because sometimes the root+inflection or root+derivation goes on to take additional changes. (Walker is a base, but the root is still walk).Stems are just bases when you are talking about inflectional changes (-ed, -ing, -s, etc.).
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