At risk, as in a contest or enterprise.
Currently calling on the telephone.
On one of the lines marked on a playing field or court; (by extension) within bounds.
On a level with the eye of the observer, as of a picture hung in on a wall.
The leading military unit in an attack.
One who leads or initiates an activity (such as an attack or a campaign).
The pointed head, or end, of a spear.
A player who initiates attacking moves.
To drive or campaign ardently for, as an effort, project, etc.