元来フットボールとは、ポロのように馬に乗って行われる競技とは違って、足で、ボールを使って行われる競技のことでした。の英語

Football originally meant "a game played with a ball on foot" - unlike a game played on horseback, such as polo.

What were the balls made of? Thousands of years ago, the Egyptians made balls out of soft leather or cloth.

a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games

It is characteristic of the fork ball, one of baseball's change-ups, that a ball that flew straight will drop suddenly just before the batter.

any of various games played with a ball (round or oval) in which two teams try to kick or carry or propel the ball into each other's goal

a strip that goes around the outside edge of a baseball outfield and warns an outfielder chasing a ball that he is approaching the fence, called warning track

In other cultures, the balls were filled with earth, grain, bits and pieces of plants, and sometimes even pieces of metal.

Some of the competitions had the pilots fly to a goal and then drop a sandbag onto a target on the ground from the air.

strike (the ball) in golf, tennis, or hockey obliquely downward so as to give a backspin or elevation to the shot

a gymnastic exercise performed starting from a position with the legs over the upper body and moving to an erect position by arching the back and swinging the legs out and down while forcing the chest upright

Two cameras attached to the ceiling focus on a ball thrown from five meters in front of the robot, calculate its course and speed, and determine the timing for the robot to hit the ball.

a golf club (a wood) with a near vertical face that is used for hitting long shots from the tee

About the cork-stuffed bat, he said, "I used that bat for batting practice. It was a mistake. I take the blame for it."

of golf, a playing method of deciding the number of strokes each player will need to finish and then ranking the players according to these predictions

a pitch that the batter swings at and misses, or that the batter hits into foul territory, or that the batter does not swing at but the umpire judges to be in the area over home plate and between the batter's knees and shoulders

Soccer is an exciting game.

To stop the player running with the ball, you must pull off one of the player’s tags.

To reduce the impact on children's legs, sponge is used as lining between the surface material and the ball's bladder.

a percussion instrument consisting of a pair of hollow pieces of wood or bone (usually held between the thumb and fingers) that are made to click together (as by Spanish dancers) in rhythm with the dance

an illegal dribble in basketball (the player uses both hands to dribble or the player starts to dribble a second time after coming to a stop)

in American football, a punt that is kicked on the first, second or third down unexpectedly from a passing formation, called quick kick

Because it uses a badminton court which is one quarter of a tennis court, they named it "quarter tennis."

A golf ball hit her directly on the forehead, but fortunately the sun visor she wore kept her from losing her eyesight.

It is attached to the bottom of a racket's grip and detects things like the ball's impact point, the player's racket speed and the ball's initial speed and rotation.

game equipment consisting of one of several small six-pointed metal pieces that are picked up while bouncing a ball in the game of jacks

in volleyball, a method of attack in which a player successfully manages to block the opponent by assuming two different positions by himself or herself, called individual time lag attack

score an extra point or points after touchdown by kicking the ball through the uprights or advancing the ball into the end zone

But for the shot put, the athletes choose their favorite shot from several shots made by different manufacturers in different countries.

a gymnastic exercise performed on the pommel horse when the gymnast (with legs together) swings his legs in a circle while alternating hands on the pommels

a simple version of hockey played by children on the streets (or on ice or on a field) using a ball or can as the puck