hertheir
Hertheir is a proposed gender-inclusive determiner in English, formed as a blend of “her” and “their.” It is intended for use with a singular referent whose gender identity is nonbinary or unspecified, as an alternative to choosing between “her” or “their” in possessive constructions.
Origin and usage: The term has appeared in online discussions, language blogs, and some inclusive-language resources
Grammar and examples: As a determiner, hertheir precedes a noun to indicate possession without assuming gender.
Reception and debate: Opinions on hertheir are mixed. Proponents view it as a useful tool for reducing
See also: Gender-neutral pronouns, Neopronouns, Inclusive language.