Sphere
Ball, Sports Ball
noun
The kanji and the word are exactly the same. That means they share meanings as well. Another meaning I'm going to add is sports ball because this is the word used for balls in various sports (soccer, baseball, etc).
Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word: You're holding onto a sports ball in your hand, let's say it's a baseball for this mnemonic's sake. You throw it at your friend who's going to catch it. As it flies through the air, though, it transforms into a tomahawk (たま). Imagine your shock and fear as you see this happening, flying towards your friend! It's going to stick in his forehead. He can't catch this with his glove!
Also notice that it has the same reading as the vocab word 玉. So, if you know that one, you may know this one too! They're kind of similar.
This can be read きゅう too, if you're talking about more of a globe sphere than the ball sphere you throw.
球を投げる
to throw a ball
球をひろう
to pick up a ball
球を打つ
to hit a ball
球けり
kicking a ball around
球ひろい
ball boy, ball girl (sports)
球あそび
playing with a ball, playing pachinko
球が当たる
to be hit by a ball
球が止まる
the ball stops
球がある
there is a ball
自分の球
one's own ball
ビリヤードの球
billiard ball
ボウリングの球
bowling ball
ああっ!球がバンカーに入っちゃったよ。
Dammit! I hit the ball into a bunker.
球の体せきをもとめる公しきって何だっけ?
What was the formula for the volume of a sphere?
ねぇ、新しい野球の球を買ったんだけど、一緒にキャッチボールしない?
Hey, I got a new baseball. Do you want to play catch with me?