Origin of deceaseMiddle English and Old French deces from Classical Latin decessus, literally , departure, past participle of decedere, to depart, go away from de-, from + cedere, to go: see cede
intransitive verb-·ceased′, -·ceas′ing
intransitive verbde·ceased, de·ceas·ing, de·ceas·es
Origin of deceaseMiddle English decesen from deces death from Old French from Latin dēcessus departure, death from past participle of dēcēdere to depart, die dē- de- cēdere to go ; see ked- in Indo-European roots.
(third-person singular simple present deceases, present participle deceasing, simple past and past participle deceased)
- (now rare) To die.
The noun and verb forms are much less commonly used than the participial adjective "deceased," particularly outside formal, literary, or legal usage.
From Old French deces (French décès).