cinch

Noun

  1. any undertaking that is easy to do; “marketing this product will be no picnic”
  2. stable gear consisting of a band around a horse’s belly that holds the saddle in place
  3. a form of all fours in which the players bid for the privilege of naming trumps

Verb

  1. tie a cinch around; “cinch horses”
  2. make sure of
  3. get a grip on; get mastery of