Grade 5 · List 1 of 5 · 34 words

Prefixes in-, im-, ir-, il-, inter-, sub-

in- changes to im-, ir- or il- to match the next letter. A free 5th grade spelling list: hear each word, print a practice sheet, or take the test.

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The words

  • incorrect
  • impossible
  • irregular
  • international
  • submarine
  • invisible
  • impolite
  • impatient
  • irresponsible
  • illegal
  • internet
  • subway
  • subtract
  • incomplete
  • interview
  • indoors
  • inactive
  • inexpensive
  • informal
  • indirect
  • injustice
  • invalid
  • impractical
  • imbalance
  • irresistible
  • interact
  • intersection
  • interchange
  • subtitle
  • subset
  • suburb

Tricky words to learn by heart

These come up alongside this pattern but don't follow it.

  • definite
  • dictionary
  • especially

In a sentence

  • incorrect: Oops, the answer was incorrect, so let's try again.
  • impossible: Flying a dragon is not impossible for a brave knight.
  • irregular: The dragon's wings made an irregular pattern in the sky.
  • international: Elves and dwarves from many lands join the international feast.
  • submarine: A friendly sea dragon swam by our golden submarine.
  • invisible: The little elf wore a cloak that was invisible in the forest.

Mistakes to watch for

For grown-ups helping at home: these are the kinds of slips this pattern tends to bring.

WordOften written as
incorrectincorect, inncorrect
impossibleimpossable, inpossible
irregularirregulr, iregular
internationalinterational, internasional
submarinesubmareen, submerine

Take the Prefixes in-, im-, ir-, il-, inter-, sub- spelling test

10 words, read aloud. No sign-up, no timer, and nothing is saved.

FOR GROWN-UPS

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A sample practice sheet for a hero named BraveOtter42, with the letters ai and ou blanked out of words and sentences to fill in.
Sample practice sheet
A sample certificate of mastery for BraveOtter42, for the spelling of ai and ay.
Sample certificate
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