-cism

Etymology
Extracted from.

Suffix

 * 1) Added to names of primarily Greek letters to indicate a phonetic phenomenon relating to the corresponding phoneme:
 * 2) Excessive usage of the phoneme.
 * 3) A sound change towards the phoneme.
 * 4) The retention of a phoneme when related varieties lose it.
 * 5) A speech disorder marked by either excessive or defective use of the phoneme.