“board”

A relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making.

Food and lodging; board.

The beginning of an activity.

To change place or posture; to go, in any manner, from one place or position to another.

To board or mount (something), especially a vehicle.

The ability, when walking aboard a ship, to anticipate the motion of the deck so as to walk steadily without losing balance.