1611 J. Florio 417/2 Raddolcire, to resweeten. Raddolcito, resweetned. Raddolcimento, a resweetning.
1854 A. Park 240/2 'Cause those whom I consider dear, Still breathe thy fragrant atmosphere, Resweeten'd through each grove.
1965 W. H. Auden (1966) 29 Shrines..Rose again Resweetened the hirsute West.
2004 (Nexis) 24 Sept. Sam and her daddy enjoy a blissful relationship that is re-sweetened each half-hour of screen time by the sharing of a chocolate cake.