That awful mysterious something that takes our loved ones away. They used to be here. They looked at us. And man has been afraid of death for so long. They did not know how to die.
Death means separation.
Three kinds of death mentioned in the bible. Physical death is separation of the spirit from the body. Spiritual death is the separation of the spirit from God. Eternal death is the separation for eternity from God the Father where you will never have fellowship with Him anymore. So we have all three kinds of death.