Definition from Wiktionary, the free dictionary
See also Suffix
suffix (plural suffixes)
- One or more letters or sounds added at the end of a word to modify the word's meaning, such as able, which changes sing into singable, for example.
Usage notes 
- The plural suffices occasionally appears (including in one educational publication), but it is not a standard Latin plural.
Coordinate terms 
Derived terms 
letters or sounds added at the end of a word to modify the word's meaning
See also 
append (something) to the end of something else