Although English assignment rules have so many exceptions, there space some trends that will help you v both your Spelling and also Pronunciation.

You are watching: Words that end with ible as a suffix

In this class you’ll part spelling rules for words finishing in ‘-able’ or ‘-ible’.

Scroll down for practice with examples that you can use in the IELTS Test.


Look at these common words finishing in ‘able’ and ‘ible’. What do you notice about the ‘root’ native (the component before the ending) in each example?

e.g. comfortable: source word = ‘comfort’


‘-able’

acceptable

avoidable

considerable

doable

enjoyable

fashionable

predictable

preventable

questionable

reasonable

remarkable

sustainable

unthinkable


‘-ible’

audible

compatible

credible

edible

eligible

feasible

horrible

invincible

legible

negligible

possible

terrible

visible


Words which end in ‘-able’ have a recognisable ‘root’ word at the start.

‘-able’ words normally come indigenous French and ‘-able’ is a ‘living’ suffix, an interpretation that the is quiet being offered to produce new words e.g.

‘That surname is unpronounceable!’ (unable to be pronounced)‘Everything is figureoutable’ (everything have the right to be figured out)‘I’m sure it’s fixable’ (able to it is in fixed)

When a word ends in -ible, the part before the ending is not commonly a recognizable English indigenous e.g. ‘terrible‘ or ‘horrible‘  come from ‘terror’ and also ‘horror’ but ‘terr-‘ and ‘horr-‘ are not recognisable English words.

‘-ible’ is only supplied in older (Latin) indigenous that have actually survived into contemporary English.


The above rule is a useful one, despite there space exceptions (see #3 below).

There are around 900 words ending in ‘-able’ and also only about 200 ending in ‘-ible’ so if you had to guess: v e.g. In the hear gapfill test, it might be safer to pick ‘-able’.

Otherwise girlfriend just have to learn individual words. In this lesson i am only using the people which i think will be advantageous for you in the IELTS Test, so friend don’t have to learn lock all! (scroll down for full list).


As girlfriend know, there space exceptions come EVERY ascendancy in English.

For example, access/ible ends in -ible even though it is formed from a recognisable root word (access). 

Also:  

convert→convertiblecorrupt→corruptibledestruct→destructibleflex→flexibleresist→ (ir)resistible

Here are some usual ‘-able’ words which have no recognisable root form but still take it ‘-able’.

applicableavailabledurablehospitableinevitableprobablevulnerableviable

1. What happens when you include -able to this verbs?

a) argue, breathe, debate, inflate, translate, value

b) notice, replace


a) Omit the final ‘e’ from the source verb:

arguable, breathable, debatable, blow up , translatable, valuable

b) Don’t omit the last ‘e’ from the root verb:

noticeable, (ir)replaceable

Double the final letter:

forget→(un)forgettableprogram→progammablestop→(un)stoppabletransfer→transferrable

3. How do you adjust these verbs to ‘-able’ adjectives?

demonstratenavigatenegotiateoperatepenetrate

Drop the final ‘e’

demonstrate→demonstrablenavigate→navigablenegotiate→negotiableoperate→(in)operablepenetrate→(im)penetrable

Change the ‘y’ come ‘i’:

deny→deniableenvy→enviablejustify→justifiablerely→reliablevary→variable

Test yourself v these IELTS-related sentences (on Desktop).

All that the words are taken from this page.


This is a great site because that practising this words:

Spell Zone

Get the complete list of every ‘-able’ and also ‘ible’ words here:

The complimentary Dictionary


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