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# 9.11: The Prefix Ex- and Some Bound Bases

Difficulty Level: At Grade Created by: CK-12

## The Prefix Ex- and Some Bound Bases

1. Each of the following words contains the prefix ex-. Analyze each word into its prefix, base, and suffix. We've given you a hand here and there:

Word = Prefix + Base + Suffix
exacting = ex + act + ing
expanded = ex + pand + ed
excitement = ex + cite + ment
explorer = ex + plore\begin{align*}\cancel{e}\end{align*} + er
excluding = ex + clude\begin{align*}\cancel{e}\end{align*} + ing
exclaiming = ex + claim + ing
exposure = ex + pose\begin{align*}\cancel{e}\end{align*} + ure
expanded = ex + pand + ed
expertise = ex + pert + ise
extender = ex + tend + er

2. A base that can stand free as a word is called a free base. A base that cannot stand free as a word is called a bound base. In the word exacting, act is a free base, but in the word expanded, pand is a bound base because it cannot stand free as a word.

3. Ex- means “out, out of, from.” In the right-hand column below you are given the meaning of the bound base in each word. Analyze each word into its three elements and be ready to discuss how the meanings of the prefix and the bound base lead to the meaning of the word:

Word = Prefix + Bound Base + Suffix Meaning of Base
excepted = ex + cept + ed “take, seize”
excesses = ex + cess + es “go, withdraw”
exceeding = ex + ceed + ing “go, withdraw”
exhibits = ex + hibit + s “hold, possess, have, handle”

4. All of the words in each of the following four sets contain the same bound base. Each word also contains a prefix and a suffix. Analyze each word in each set into prefix plus bound base plus suffix. Show any assimilation.

Word = Prefix + Bound Base + Suffix
Set #1 prohibited = pro + hibit + ed
inhibiting = in + hibit + ing
exhibition = ex + hibit + ion
Set #2 proceeded = pro + ceed + ed
succeeds = sub\begin{align*}\cancel{b}\end{align*} +c + ceed + s
exceeding = ex + ceed + ing
Set #3 recesses = re + cess + es
succeees = sub\begin{align*}\cancel{\mathrm{b}}\end{align*}+c + cess + es
accessed = ad\begin{align*}\cancel{\mathrm{d}}\end{align*}+c + cess + ed
Set #4 concepts = com\begin{align*}\cancel{m}\end{align*}+n + cept + s
accepted = ad\begin{align*}\cancel{d}\end{align*}+c + cept + ed
reception = re + cept + ion
intercepted = inter + cept + ed

Teaching Notes.

Item 3. Again, the students' observations about connections between the root meanings and the current meanings of these words can get a bit discursive and idiosyncratic. And again, arriving at an agreed-upon “correct” answer is probably less important than the chance for thought and discussion, and honest disagreement. We are looking for observations such as the following: “Excepted means that something has been taken out or taken from, and that is what you do when you except something: you leave it out.” “Excess means “go out,” and when something is an excess is goes out beyond what you need or want.” That sort of thing.

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