/ɔk.tɑ̃t.nɛʁ/
eighty years old
Etymology tree Latin octāgintābor. French octante Proto-Indo-European *déḱm̥ Proto-Indo-European *ḱm̥tóm Proto-Italic *kəntom Latin centum Latin -(ē)nus Latin centēnus Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -ārius Latin centenāriusbor. French centenairebf. French -enaire French octantenaire From octante + -enaire. Cognate with Italian ottantenario.
eighty-year-old
Synonyms: octogénaire
Etymology tree Latin octāgintābor. French octante Proto-Indo-European *déḱm̥ Proto-Indo-European *ḱm̥tóm Proto-Italic *kəntom Latin centum Latin -(ē)nus Latin centēnus Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -ārius Latin centenāriusbor. French centenairebf. French -enaire French octantenaire From octante + -enaire. Cognate with Italian ottantenario.
eightieth anniversary
Etymology tree Latin octāgintābor. French octante Proto-Indo-European *déḱm̥ Proto-Indo-European *ḱm̥tóm Proto-Italic *kəntom Latin centum Latin -(ē)nus Latin centēnus Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -ārius Latin centenāriusbor. French centenairebf. French -enaire French octantenaire From octante + -enaire. Cognate with Italian ottantenario.