trebly

/ˈtrɛbli/
adverb
  1. Three times as much; in a threefold manner or degree.
    • She was trebly careful after the accident, checking everything twice.
    • His responsibilities increased trebly when he took on the new project.
    • The cost of living has risen trebly in the past decade.
adjective
  1. Having three parts or aspects; triple.
    • They faced a trebly challenge: lack of time, money, and staff.
    • The trebly structure of the argument made it hard to follow.
    • The trebly melody wove three distinct tunes together.