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8.23: Lesson Forty-seven

Difficulty Level: At Grade Created by: CK-12


1. Analyze each of the following words enough to show all of the suffixes and prefixes they contain. Show any changes:

Word Analysis
misadvised mis + ad + vise + ed
unsuccessful un + sub + c + cess + ful
impresses in + m + press + es
insane in + sane
reoccurred re + ob + c + cur + r + ed
typists type + ist + s
gentlest gentle + est
regularize regul + ar + ize or regul + ar + ize
friendlier friend + ly + i + er
frightens fright + en + s
thoughtless thought + less
naughtier naught + y + i + er
affection ad + f + fect + ion
subtracting sub + tract + ing
informers in + form + er + s
invisible in + vise + ible
oppressive ob + p + press + ive
escapist ex + s + cape + ist
happiest hap + p + y + i + est
vaporized vapor + ize + ed
lovelier love + ly + i + er
lengthening length + en + ing
rightful right + ful
pointlessness point + less + ness
cheery cheer + y
unassisted un + ad + s + sist + ed
suggests sub + g + gest + s
offense ob + f + fense
opportunist ob + p + portune + ist
simplest simple + est
individualize in + di + vide + ual + ize
motherly mother + ly
moistened moist + en + ed
flavorful flavor + ful
sightless sight + less
knotty knot + t + y

2. Sort the words into the following groups:

Words with the prefix . . .
ad- in-1 “not” in-2 “in” ob- sub-
misadvised insane impresses reoccurred unsuccessful
affection invisible informers oppressive subtracting
unassisted individualize offense suggests
Words with the suffix . . .
-en -est -ful -ist
frightens gentlest unsuccessful typists
lengthening happiest rightful escapist
moistened simplest flavorful opportunist
Words with the suffix . . .
-ize -less -ly -y
regularize thoughtless friendlier naughtier
vaporized pointlessness lovelier happiest
individualize sightless motherly cheery

3. Among the words above you should be able to find at least four that contain each of the following things:

An example of changing <y> to <i>: An example of deleting silent final <e> A prefix or suffix other than the ones listed above:
friendlier misadvised misadvised
naughtier typists unsuccessful
happiest gentlest impresses
lovelier escapist reoccurred

Teaching Notes.

Item 1. This table contains some analyses that may raise questions: The base naught in naughtier is from an obsolete noun that meant “Wickedness, evil, moral wrong, mischief.” Escapist contains a rare assimilation of ex-that occurs in a few adoptions from French and Italian: ex + s + cape + ist Some students may want to analyze the base portune into port + une. There's something to be said for such an analysis: Compare the words like fortune, tribune, jejune, in which <une> looks and feels like a suffix. But apparently the <une> in opportune is better treated as part of the base rather than as a suffix. The suffix -ual in individual may seem odd to the students: It is a form of the more common -al, which forms adjectives and nouns.

Item 3. Other words with final <e> deletion: opportunist, simplest. Other words with prefixes or suffixes not listed in the tables: typists, friendlier, frightens, naughtier, affection, subtracting, informers, invisible, oppressive, escapist, vaporized, lovelier, lengthening, pointlessness, unassisted, suggests, individualize, moistened.

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Date Created:

Feb 23, 2012

Last Modified:

Apr 29, 2014
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