redden


redden (http://definr.com/redden)

     v 1: turn red, as if in embarrassment or shame; "The girl blushed
          when a young man whistled as she walked by" [syn: blush,
           crimson, flush]
     2: make red; "The setting sun reddened the sky"
     3: turn red or redder; "The sky reddened"