IPA: //koʊˈhɛr//
KK: /koʊˈhɛr/
A person who shares the inheritance of an estate with one or more others.
After their father's passing, the siblings became coheirs to the family fortune.
Coheir → It is formed from "co-" (meaning together) and "heir" (from Old French *eir*, meaning one who inherits). The word "coheir" refers to a person who inherits together with one or more others.
Think of people inheriting 'together' ('co-') — that's what a coheir means.