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Words ending in -able or -ible

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Summary

Words ending in -able or -ible

In a nutshell

The suffixes '-able' and '-ible' are used to turn verbs into adjectives. Words ending in these suffixes often sound the same but they are spelt differently. In this summary you'll learn which words are spelt with '-able' and '-ible'.



The suffix '-able' 

The suffix '-able' is usually used if you can hear the whole root word before the ending.


Examples

​​verb

Rely

Adapt

Prefer

Adjective

Reliable

Adaptable

Preferable


Note: If there's a consonant before a 'y', it often changes to an 'i', For example, deny becomes deniable.


Root words ending in 'ce' and 'ge'

If the root word ends with 'ce' or 'ge', you must keep the 'e' when you add the suffix.


Examples

​​Verb

Manage

Knowledge

Notice

Adjective

Manageable

Knowledgeable

Noticeable



The suffix '-ible' 

The suffix '-ible' is usually used if you can't hear the whole root word before the ending.


Examples

'Visible' has the suffix 'ible' as 'vis' isn't a whole root word.

'Incredible' has the suffix 'ible' as 'incred' isn't a whole root word.


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FAQs - Frequently Asked Questions

Which suffix do you use if the root word ends with 'ce' or 'ge'?

When is the '-ible' suffix used?

When is the '-able' suffix used?

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