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Educational worksheet focusing on prefixes and suffixes, where students identify root words from given terms.

Worksheet titled "Prefixes and Suffixes" with a pencil illustration, listing words like "breathless" and "quickly" for identifying root words.

Worksheet titled "Prefixes and Suffixes" with a pencil illustration, listing words like "breathless" and "quickly" for identifying root words.

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Show Answer Key & Explanations Step-by-step solution for: 19 Free Printable Prefix Worksheets 4th Grade - Free PDF at ...
Let’s go through each word one by one. We need to find the root word — that’s the main part of the word, without any prefix (added at the beginning) or suffix (added at the end).

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1. breathless
→ “-less” is a suffix meaning “without.”
→ Root word: breath

2. quickly
→ “-ly” is a suffix that turns an adjective into an adverb.
→ Root word: quick

3. overlook
→ “over-” is a prefix meaning “too much” or “above.”
→ Root word: look

4. defrost
→ “de-” is a prefix meaning “remove” or “reverse.”
→ Root word: frost

5. wonderful
→ “-ful” is a suffix meaning “full of.”
→ Root word: wonder

6. comfortable
→ “-able” is a suffix meaning “can be done.” But wait — actually, “comfort” is the root, and “-able” is added to it. Sometimes we drop the ‘e’ when adding suffixes, but here “comfort” stays mostly intact.
→ Root word: comfort

7. preheat
→ “pre-” is a prefix meaning “before.”
→ Root word: heat

8. unkind
→ “un-” is a prefix meaning “not.”
→ Root word: kind

9. submarine
→ “sub-” is a prefix meaning “under.”
→ Root word: marine

10. undersea
→ “under-” is a prefix meaning “below.”
→ Root word: sea

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Final Answer:
breath
quick
look
frost
wonder
comfort
heat
kind
marine
sea
Parent Tip: Review the logic above to help your child master the concept of english prefixes and suffixes worksheet.
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