will have been mystifying

• future perfect progressive

  future perfect progressive

  Used to describe a continuous action that will progress up until a designated point of completion in the future.

  of mystify.
  mystify

  verb (used with object)

  to perplex, puzzle, or baffle; defy the understanding of.

Related Words

• baffle
• confound
• deceive
• perplex
• puzzle
• stump