Knowledge
Information
noun
You're discerning about what you know. You choose what to keep and what not to keep in your brain. This is the sum of your knowledge.
This is a jukugo word, which usually means on'yomi readings from the kanji. You didn't learn 知's on'yomi when you learned the kanji, so here's a mnemonic to help you:
What's something you have a ton of knowledge about? Cheese (ち)! You have a massive, encyclopedic knowledge of all the world's cheeses. As a true bleu expert, it really grates on you that most other people's cheese knowledge is so full of holes.
彼は役に立たない知識ばかり知っています。
He knows only useless knowledge.
いつもタメになる知識をありがとうございます。
Thank you for always providing useful knowledge.
彼は持ち合わせの知識で何とかその場をしのいだ。
He managed to get through the situation with his existing knowledge.