verb (v)

• cause to be firmly attached(verb.contact)

  Example:
  Fasten the lock onto the door.
  

  Synonym:
  fix, secure
  Antonym:
  unfasten
  

  source: wordnet30
• become fixed or fastened(verb.contact)

  Example:
  This dress fastens in the back.
  

  source: wordnet30
• attach to(verb.contact)

  Example:
  They fastened various nicknames to each other.
  

  Synonym:
  affix, annex, stick on
  

  source: wordnet30
• make tight or tighter(verb.change)

  Synonym:
  tighten
  

  source: wordnet30
• To fix firmly; to make fast; to secure, as by a knot, lock, bolt, etc.; as, to fasten a chain to the feet; to fasten a door or window.(verb)

  source: webster1913
• To fix one's self; to take firm hold; to clinch; to cling.(verb)

  source: webster1913