5th Grade Decoding/Word Attack
Review
Lesson 20
Structural Analysis: Prefixes im-, in-, iril-, Suffixes –ant, -ent, -eer, -ist, -ian, ous, -eous, -ious, Decode Longer Words
Word Study Words
Impractical
Illegal
Consistent
Musician
Mountainous
Glorious
Biography
Legislatures
Experimental
Courteous
Structural Analysis:
Prefixes im-, in- ir-, ilLook at this word and watch me read it:
immature
Turn to your partner and divide
the word into syllables. Be sure to
identify the prefix and the root
word.
im/ma/ture
prefix-im, and root word mature
Did you notice that the prefix formed the first
syllable of the word?
Structural Analysis:
Prefixes im-, in- ir-, ilLook at the chart below. Copy this chart into your journal. Read
each word, then write its prefix and root word in the proper
columns. Be sure that you can blend the parts back together to
read the word.
Word
Prefix
Root Word
inconsistent
in
con/sist/ent
immobile
im
mo/bile
illuminate
incapable
irrational
il
in
ir
lu/min/ate
cap/a/ble
ra/tion/al
Structural Analysis:
Suffixes –ant, -ent, -eer, -ist, -ian, ous, eous, -ious
Look at this word and watch me read it:
accountant
Turn to your partner and divide
the word into syllables. Be sure to
identify the suffix and the root
word.
ac/count/ant
suffix-ant, and root word account
Structural Analysis:
Suffixes –ant, -ent, -eer, -ist, -ian, ous, eous, -ious
Remember that:
•Breaking longer words into smaller parts, such
as prefixes, suffixes, and root words can help
you decode the words.
•The suffix –ian can be pronounced with 1 or 2
syllables depending on the word to which it is
attached.
Structural Analysis:
Suffixes –ant, -ent, -eer, -ist, -ian, ous, eous, -ious
Look at the chart below. Copy this chart into your journal. Read each
word, then write its suffix and root word in the proper columns. Be sure
that you can blend the parts back together to read the word.
Word
absorbent
glamorous
assistant
librarian
politician
laborious
beauteous
Root Word
Suffix
ab/sorb
ent
glam/or
ous
as/sist
li/brar/y
pol/i/tic
ant
ian (note it has 2 syllables in this word)
ian
la/bor
ious
beau/ty
eous
Decode Longer Words
When you come to a longer word, you can
try several different strategies to
determine its pronunciation. You can…
Use letter sounds and look for familiar words and
patterns.
Try dividing the word into syllables
Break the word into smaller word parts, such as roots
and affixes.
Use a dictionary to clarify the word’s pronunciation.
Decode Longer Words
Look at the words below. Think about the strategies to
decode words that we have practiced. Tell your partner
what each word is and what strategy you used.
irretrievable
dubious
miraculous
implode immaculate
contentment