An angel (Hebrew: מלאך; mal'ach, Arabic: ملاك; malak, Latin: angelus, Ancient Greek: ἄγγελος; ángelos) is a supernatural, intellectual being found in several (often monotheistic) religions. In Christianity, Islam, Judaism, and Zoroastrianism, angels, as servants or protectors of man, usually act as messengers from God (or the gods), from whom they are clearly distinguished, and possess superhuman abilities and attributes. In other religions, supernatural beings are sometimes compared to angels because they share some characteristics with angels and are considered angelic. The word angel comes from the Greek ἄγγελος, ángelos, meaning "messenger". The Hebrew word for angel is מלאך, mal'ach, which also means "messenger." The Arabic word ملاك, malak, is etymologically related to this. The term 'angel' in itself does not denote a divine being. For example, the author of the last book of the Old Testament is referred to as 'Malachi' - 'my messenger' and the predecessors of the seven churches in the book of Revelation are referred to as 'aggeloo'. Angels can take on any external form.