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6.3: Lesson Twenty-seven

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Spelling With Prefixes

1. The prefixes un-, re-, dis-, and mis- can cause some spelling problems. Look at the word misspell. We can analyze it into the prefix mis- plus the free stem spell. Watch out for that <ss>! There is one <\text{s}> for the mis- and one <\text{s}> for the spell: mis + spell = misspell.

\bullet Anytime you add mis- or dis- to a stem that starts with an <\text{s}>, you will get an <ss>.

\bullet Anytime you add the prefix un- to a stem that starts with an <n>, you will get an <nn>.

\bullet Anytime you add the prefix re- to a stem that starts with an <e>, you will get an <ee>.

2. Add the prefix to the free stem. All combine by simple addition, but watch out for cases of <ss>, <nn>, and <ee>:

Prefix + Free Stem = New Word
mis + spell = misspell
un + natural =
mis + spend =
un + necessary =
re + educate =
un + noticed =
dis + satisfied =
un + nerve =

3. Now try these. They also combine by simple addition:

Prefix + Free Stem = New Word
dis + service =
re + examine =
dis + color =
mis + strike =
dis + obey =
re + elect =
dis + solve =
un + cover =
mis + shape =
mis + leading =
un + needed =
un + remarkable =

4. Now analyze each of the following words into its prefix, free stem, and suffix. Show any changes that were made when the suffix was added:

Word = Prefix + Free Stem + Suffix
miscounted = + +
undecided = + +
mislaying = + +
undoing = + +
misdeeds = + +
mistreated = + +
discoverer = + +
disgraces = + +
unexamined = + +
discharged = + +
reordered = + +
discounts = + +
diseases = + +
returning = + +
unnerving = + +
disgracing = + +
repacked = + +

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Feb 23, 2012

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Apr 29, 2014
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CK.ENG.ENG.SE.1.Basic-Speller.6.3

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