ˈgärˌbō(ə)rd noun
or garboard strake
Etymology: obsolete Dutch gaarboord, from obsolete Dutch gaar- (perhaps from Dutch garen to gather, from Middle Dutch, contraction of gaderen ) + Dutch boord board, ship's side; akin to Old English gaderian to gather and to Old English bord board, ship's side — more at gather , board
: the plank or planking in a wooden ship and the plate or plating in a steel ship lying next to the keel — see ship illustration