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Root Words

Grade 4
Sep 1, 2022

What are Root Words? 

A root word is a word without a prefix or suffix, other words are formed from a root word. 

A root word can function as a whole word on its own. 


  • The root word of brushing, brushes and brushed is brush.  
  • The root word of scares, scared, scaring is scare. 

What is an Affix? 

An addition to a word’s base form or stem in order to change its meaning or create a new word. 


A prefix is a word or phrase that comes before the root. 



1. Consider the word Reform

  • The prefix is re-, while the root word is form. 
  • Form is still a word in itself. 

2. Transmit.

  • The word ‘trans’ is the prefix meaning across,
  • ‘mit’ is the root meaning “to send.” 


A suffix is a word that is appended to the end of a root or root word. 



1. In the words, inactivity, veracity, parity, serenity  

  • -Ity is the suffix 

2. heaviness, sadness, rudeness, testiness 

  • -ness is the suffix


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