Unambiguous is a term used to describe anyone of any gender who is absolutely certain of their gender. It is the polar opposite of Questioning.
Unambiguous does not apply to everyone who isn’t Questioning. Also, it is not to be confused with Comgender (the polar opposite of Agender), since people can be Agender Unambiguous if they are 100% sure of being agender. Instead, Unambiguous people would be in the areas far from the uncertain section in the middle in the chart to the right.