decease
dɪˈsiːs
noun
a person’s death.
he held the post until his untimely decease in 1991
death,dying,demise,end,passing,passing away,passing on,loss of life,departure from life,expiry,expiration,final exit,eternal rest,snuffing,curtains,kicking the bucket,croaking,quietus
verb
die.
he deceased at his palace of Croydon