verb (v)

• add as an extra or as a gratuity(verb.possession)

  source: wordnet30
• give up in the face of defeat of lacking hope; admit defeat(verb.competition)

  Synonym:
  chuck up the sponge, drop by the wayside, drop out, fall by the wayside, give up, quit, throw in the towel
  Antonym:
  enter, participate
  

  source: wordnet30
• to insert between other elements(verb.communication)

  Synonym:
  come in, inject, interject, interpose, put in
  

  source: wordnet30