The Collaborative International Dictionary
Deceasing
Decease \De*cease"\, v. i. [imp. & p. p. Deceased; p. pr. & vb. n. Deceasing.] To depart from this life; to die; to pass away.
She's dead, deceased, she's dead.
--Shak.
When our summers have deceased.
--Tennyson.
Inasmuch as he carries the malignity and the lie with
him, he so far deceases from nature.
--Emerson.
Wiktionary
deceasing
vb. (present participle of decease English)