Alongside.
On or onto a horse, a camel, etc.
On board; into or within a ship or boat; hence, into or within a railway car.
On base.
Into a team, group, or company.
On board of; onto or into a ship, boat, train, plane.
Onto a horse.
We all went aboard the ship.
In this context.
To this place; used in place of the more dated hither.
At this point in the argument, narration, or other, usually written, work.
In, on, or at this place.
This time, the present situation.
This place; this location.
Used semi-assertively to offer something to the listener.
Used for emphasis at the beginning of a sentence when expressing an opinion or want.
Filler after a noun or demonstrative pronoun, solely for emphasis.
Filler after a demonstrative pronoun but before the noun it modifies, solely for emphasis.