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Son grand-père est décédé hier soir.
His grandfather died last night.
to die, formal and respectful term
Elle est décédée à l âge de quatre-vingts ans.
She died at the age of eighty.
Le patient est décédé pendant la nuit.
The patient died during the night.
used in obituaries and official notices
Monsieur Dupont est décédé le cinq mai.
Mr Dupont passed away on the fifth of May.
From Latin decedere.