Other
noun, の adjective
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 need to go for a drive to the public gardens, but you aren't going to get your normal car, you're going to get your other car. Your hoe car (ほか)! It's a car made entirely out of garden hoes. You can drive it and hoe with it at the same time! Your other car can't do that!
他のスタッフは今いません。
No other staff are here right now.
他の一年生の子は手を上げた。
The other first-graders raised their hands.
その他にアイディアはありますか？
Do you have any other ideas?