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Moon7296 Posted 15 years ago
Vocabulary

Prefix = in? or im? impossible

A good example is the negative prefix in- in a word like impossible: the alveolar nasal of the prefix /n/ becomes bilabial nasal /m/ due to the influence of the bilabial stop /p/ of possible.

Q) I don't understand why the quotation above says the prefix of the word impossible is in and not im!
  

Top answer

It doesn't really. It says that the core prefix in- has changed to im - in 'impossible'.

  • It doesn't really.
  • It says that the core prefix in- has changed to im - in 'impossible'.
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3 Answers
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It doesn't really. It says that the core prefix in- has changed to im- in 'impossible'.
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Ah.. what you mean is the prefix of 'impossible' is im- as shown but the core prefix is in-?
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Yes. in- for most words, but it takes the form im- for m- and p-words (immobile, impossible), il- for l-words (illegal, illogical) and ir- for r-words (irresponsible, irrevocable).

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