misgender

[mis-jen-der]
verb (used with object)
  1. to refer to or address (a person, especially one who is transgender) with a pronoun, noun, or adjective that inaccurately represents the person's gender or gender identity: At first my teacher misgendered me.

Origin of misgender

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018