An adverb meaning 'backward.' Most notably used in 2 Kings 20:10-11 and Isaiah 38:8 where the shadow on Hezekiah's sundial went backward as a miraculous sign of healing.
While 'backward' in Scripture usually signals shame or defeat, here it signals grace: God reverses time to authenticate Hezekiah's healing. The same God who says 'Do not dwell on the former things' (Isaiah 43:18) can also move shadows backward. In Christ, death itself is reversed. 'Behold, I am making all things new' (Revelation 21:5).