DCHP-1 Online
cellar 
n. an underwater cavern or deep hole at the foot of a rapid.
- 1854 The requisites for an examination of the Ottawa are . . . to paddle a bark canoe, run a rapid, and . . . swim when your canoe is swamped in a "cellar," or riddled on a rock.
- 1854 The requisites for an examination of the Ottawa are . . . to paddle a bark canoe, run a rapid, and . . . swim when your canoe is swamped in a "cellar," or riddled on a rock.