Breath
noun
The kanji and the word are exactly the same. That means they share meanings as well.
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 smell someone's icky (いき) breath. It's gross. Your skin crawls and your eyes roll back in your head from the icky, icky smell. You might die.
最後の息
one's last breath
自分の息
one's own breath
人の息
people's breath
息のスピード
breathing speed
息のにおい
the smell of one's breath
息の音
the sound of breathing
息を飲む
to have one's breath taken away, to gulp
息をする
to breathe
息を止める
to hold one's breath
息がつまる
to become unable to breathe properly
息が苦しい
to have trouble breathing
息が切れる
to be short of breath
あんたの息、死ぬほどくさいよ。
Your breath is so stinky that I could die.
びっくりしすぎて、息が止まるかと思ったよ。
You knocked the breath out of me!
そんなに走り回ったら息が切れるよ！
If you run around that much, you'll be out of breath!