adverb (r)

• under normal conditions(adv.all)

  Synonym:
  normally, ordinarily, unremarkably, usually
  Antonym:
  outstandingly, remarkably, unco, unusually
  

  source: wordnet30
• Usually; generally; ordinarily; frequently; for the most part; as, confirmed habits commonly continue through life.(adverb)

  source: webster1913