Root Words & Inflections
Identify frequently occurring root words and their inflectional forms (e.g., look/looks/looked/looking), using affixes as clues to word meaning and understanding how suffixes create nouns and adjectives
What a learner can do afterwards
- Identify 'play' as the root in 'played', 'playing', 'player'
- Explain that '-ful' in 'careful' means 'full of care'
- Use '-ness' and '-er' to form nouns from root words: 'sad → sadness', 'teach → teacher'
The lesson
Many words come from one root word. The root holds the main meaning. When you add small parts to the front or end, the word changes shape, but the root meaning stays the same.
Suffixes can turn a root word into a new noun or adjective. Add '-ful' to 'care' and you get 'careful,' which means full of care.
To find a root word, peel off the ending. '-ness' turns a describing word into a noun, like sad + ness = sadness. '-er' can name a person who does something, like teach + er = teacher.
A root word keeps its meaning through every form; suffixes like -ful, -ness, and -er build new words on top of it.
Watch it
Where it sits
Learn first
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Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.