DCHP-1 Online
lighten Obs. 
v. make a décharge (def. 2).
See also: décharge (def. 2)
- 1829 (1947) The whole of these Rapids we shot down, and only lightened at two of them, where it was necessary to run altho' dangerous, as there was no possibility of making a portage. . . .
- 1830 (1963) . . . ran twelve strong rapids, two of which we lightened at. . . .
- 1829 (1947) The whole of these Rapids we shot down, and only lightened at two of them, where it was necessary to run altho' dangerous, as there was no possibility of making a portage. . . .