The crossword solutions for the term ARC HIT IN A HIGH are 'LOB' (3 letters) and 'SLAP' (4 letters). 'LOB' is a tennis term that refers to a shot that is hit high in the air with a slow, looping arc. It is usually used to keep the opponent off balance and is often used as a defensive shot. 'SLAP' is a term used in many sports, including baseball, hockey, and lacrosse, to describe a hard, flat hit. It is usually used to generate power and can be used to hit the ball over a long distance.