Words with -able and -ible

Key Notes:

1. Definition and Function:

• Suffix “-able”: Added to the end of a base word to form an adjective that means “capable of” or “suitable for.”
  • Examples: comfortable (capable of providing comfort), readable (suitable for reading).
• Suffix “-ible”: Also forms an adjective and often means “capable of” or “worthy of.”
  • Examples: invisible (capable of not being seen), accessible (worthy of access).

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2. Common Patterns and Rules:

• -able is more commonly used than -ible.
• -able can generally be used with a broader range of base words than -ible.
• -ible is often used with words that have Latin origins.

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3. Base Word Compatibility:

• Some base words can take either suffix, but their meanings might slightly change. For example:
  • convert → convertible (capable of being converted) and convertible (able to be converted, especially in the context of cars).

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4. Irregular Forms:

• Some words may not follow the typical pattern, such as:
  • terrible (not “terribleable”) and visible (not “visable”).

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5. Examples to Illustrate:

• -able:
  • enjoyable (capable of being enjoyed)
  • manageable (capable of being managed)
  • repairable (capable of being repaired)
• -ible:
  • audible (capable of being heard)
  • possible (capable of happening)
  • responsible (capable of being held accountable)

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6. Practice and Application:

• Identify Suffixes: Have students identify and underline the suffixes in words.
• Create Sentences: Ask students to use words with -able and -ible in sentences to demonstrate their understanding of the meaning.
• Word Sorts: Provide lists of words with -able and -ible and have students sort them into categories.

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7. Common Misconceptions:

• Avoid confusion between -able and -ible by practicing with a variety of words and contexts.
• Clarify that not all words with these suffixes are interchangeable; their usage depends on the root word and meaning.

let’s practice!