aboard

The story

1. Middle English · inherited fromabord
2. English todayaboard

From Middle English abord, from a- (“on”) + bord (“board, side of a ship”); equivalent to a- + board.

First known use, by meaning

• from ca. 1350—1470 On board; into or within a ship or boat; hence, into or within a railway car.
• from late 19th c. On or onto a horse, a camel, etc.
• from mid-20th c. On base.
• from mid-20th c. Into a team, group, or company.
• from ca. 1350—1470 Alongside.
• from ca. 1350—1470 On board of; onto or into a ship, boat, train, plane.
• from mid-20th c. Onto a horse.
• early 16th–late 17th c. Across; athwart; alongside.