Belonging to em, their (singular). Gender-neutral third-person singular possessive adjective, coordinate with his and her.(adjective)
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Use "eir" in a sentence
"The word eirēnē is from the Greek goddess of the same name (Pax in Roman mythology) and was a deity that was against war."
"This is not much help to Latvia, where the word begins with "eir"."
"Safety is served by meeting th eir compulsive networking halfway, allowing them to check messages, make calls and tap the cloud by voice command rather than by fumbling with a touchscreen."