Artificial intelligent assistant

wash-strake

wash-strake Naut.
  Also -streak.
  [? f. wash n.]
  = washboard 1.

1809 Naval Chron. XXI. 299 Exclusive of a moveable wash strake. 1834 M. Scott Cruise Midge iii, A large Eboe canoe,..the bottom hollowed out of one single tree, but there was a washstreak of some kind of hardwood plank, so as to raise the gunwale about a foot above the ledge of the original vessel.

Oxford English Dictionary

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