All defined terms are in italics and are listed alphabetically in the Definitions section - see pages 2235.
On the putting green, if the ball or ball-marker is accidentally moved in the process of the player removing a loose impediment, the ball or ball-marker must be replaced. There is no penalty, provided the movement of the ball or ball-marker is directly attributable to the removal of the loose impediment. Otherwise, the player incurs a penalty of one stroke under Rule 18-2.
When a ball is in motion, a loose impediment that might influence the movement of the ball must not be removed.
Match play - Loss of hole; Stroke play - Two strokes.
(Searching for ball in hazard - see Rule 12-1)
(Touching line of putt - see Rule 16-1a)