mispronoun
Using the wrong pronouns for someone when they go along with different pronouns.
My friend mispronouned me even though I told her I use they/them pronouns.
Mispronouned
To call a person a different gender/pronoun from what they are.
No, jemima. They are not a women, you have mispronouned them. They are in fact a man. Know your pronouns.