verb (v)

• make strong or stronger(verb.change)

  Synonym:
  beef up, strengthen
  Antonym:
  weaken
  

  source: wordnet30
• enclose by or as if by a fortification(verb.contact)

  Synonym:
  fort
  

  source: wordnet30
• prepare oneself for a military confrontation(verb.competition)

  Synonym:
  arm, build up, gird
  Antonym:
  demilitarise, demilitarize, disarm
  

  source: wordnet30
• add nutrients to(verb.change)

  source: wordnet30
• add alcohol to (beverages)(verb.change)

  Synonym:
  lace, spike
  

  source: wordnet30
• To add strength to; to strengthen; to confirm; to furnish with power to resist attack.(verb)

  source: webster1913
• To raise defensive works.(verb)

  source: webster1913