Deceasing is a solemn word that refers to the act of dying or passing away. Synonyms for deceasing include expiring, departing, perishing, and leaving this world. Other synonyms rooted in religious or spiritual beliefs include crossing over, transitioning, ascending to the afterlife, and meeting one's maker. More casual synonyms for deceasing include kicking the bucket, biting the dust, and pushing up daisies. While none of these terms takes away from the gravity of losing a loved one, they offer a range of ways to talk about an inevitably sad subject. By using these synonyms, one can communicate respectfully about the passing of someone important.