Learn on PengiVocabulary from Classical Roots (Book 6)Chapter 4: Lessons 13-15

Lesson 15: Changing

Grade 4 students explore the Latin suffix -ible/-able ("able to be") and the Greek suffix -ize ("to cause to be") in Lesson 15 of Vocabulary from Classical Roots Book 6. Students learn ten vocabulary words built from these suffixes, including illegible, identifiable, predictable, colonize, generalize, and vocalize. Exercises guide students to use suffix clues to decode meaning, identify antonyms, apply words in context, and distinguish when to spell the suffix as -ible versus -able.

Section 1

The Suffix -ible/-able: Able to Be

These words use the suffix -ible or -able, from the Latin suffix -ibilis, which means "able to be" or "worthy of." They describe a quality or a potential for something to be acted upon.

Key Words

WordDefinition
horrible (adj.)Awful, able to cause horror
identifiable (adj.)Able to be recognized, capable of being identified
illegible (adj.)Not able to be read
predictable (adj.)Able to be foretold, capable of being predicted

📝Example Usage

  • His handwriting was so messy that his note was completely illegible.
  • The outcome of the mystery movie was entirely predictable; I guessed the ending in the first ten minutes.

Section 2

The Suffix -ize: To Cause or To Act

These action words all end with the suffix -ize, from the Greek suffix -izein, which means "to cause to be" or "to act in a special way." It's a powerful tool for turning ideas into verbs!

Key Words

WordDefinition
colonize (v.)To make settlements in a new place, to form colonies
generalize (v.)To draw a broad conclusion from particular facts
socialize (v.)To participate in a group, talking to many people at an event
trivialize (v.)To make seem unimportant, to present as trivial
visualize (v.)To make a picture in the mind, to imagine
vocalize (v.)To produce the sound of the voice, as in babbling, talking, and singing

📝Example Usage

  • Before giving her speech, Maria took a moment to visualize herself speaking confidently to the audience.
  • You shouldn't generalize about all movies based on one bad one you saw.

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 4: Lessons 13-15

  1. Lesson 1

    Lesson 13: Belonging

    LearnPractice
  2. Lesson 2

    Lesson 14: Illuminating

    LearnPractice
  3. Lesson 3Current

    Lesson 15: Changing

    LearnPractice

Lesson overview

Expand to review the lesson summary and core properties.

Expand

Section 1

The Suffix -ible/-able: Able to Be

These words use the suffix -ible or -able, from the Latin suffix -ibilis, which means "able to be" or "worthy of." They describe a quality or a potential for something to be acted upon.

Key Words

WordDefinition
horrible (adj.)Awful, able to cause horror
identifiable (adj.)Able to be recognized, capable of being identified
illegible (adj.)Not able to be read
predictable (adj.)Able to be foretold, capable of being predicted

📝Example Usage

  • His handwriting was so messy that his note was completely illegible.
  • The outcome of the mystery movie was entirely predictable; I guessed the ending in the first ten minutes.

Section 2

The Suffix -ize: To Cause or To Act

These action words all end with the suffix -ize, from the Greek suffix -izein, which means "to cause to be" or "to act in a special way." It's a powerful tool for turning ideas into verbs!

Key Words

WordDefinition
colonize (v.)To make settlements in a new place, to form colonies
generalize (v.)To draw a broad conclusion from particular facts
socialize (v.)To participate in a group, talking to many people at an event
trivialize (v.)To make seem unimportant, to present as trivial
visualize (v.)To make a picture in the mind, to imagine
vocalize (v.)To produce the sound of the voice, as in babbling, talking, and singing

📝Example Usage

  • Before giving her speech, Maria took a moment to visualize herself speaking confidently to the audience.
  • You shouldn't generalize about all movies based on one bad one you saw.

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 4: Lessons 13-15

  1. Lesson 1

    Lesson 13: Belonging

    LearnPractice
  2. Lesson 2

    Lesson 14: Illuminating

    LearnPractice
  3. Lesson 3Current

    Lesson 15: Changing

    LearnPractice