On board | Define On board at Dictionary.com

O.E. bord "a plank, flat surface," from P.Gmc. *burdam (cf. O.N. borð "plank," Du. bord "board," Goth. fotu-baurd "foot-stool," Ger. Brett "plank"), from PIE *bhrdh- "board," from base *bherdh- "to cut." See also ...

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