Verb
(transitive) To refer to (someone) using terms that express the wrong sex or gender, either unknowingly or intentionally; for example, calling a woman "son" or a boy "she".
Coordinate terms: deadname, mispronoun
(transitive, grammar) To use the wrong grammatical gender with a word.
Source: en.wiktionary.org“Please don’t misgender me. Source: Internet
Rather than misgender someone, just ask the person how they prefer to be addressed. Source: Internet