affix

名词 affix:

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

动词 affix:

1. attach to
   同义词：stick on
2. add to the very end
   同义词：append, add on, supplement
3. attach or become attached to a stem word

1. Please affix a stamp.
   请贴上邮票。
2. Affix a label to a package.
   在包裹上贴张标签