affix in WordNet English dictionary

1. add to the very end
   "He appended a glossary to his novel where he used an invented language"
   append  add on  supplement  affix 
   
2. attach to
   "affix the seal here"
   affix  stick on 
   
3. attach or become attached to a stem word
   "grammatical morphemes affix to the stem"
   affix 
   

1. a linguistic element added to a word to produce an inflected or derived form
   affix