Cold
Cool, Cold To The Touch
い adjective
Something that is cool is cold. This refers to something that is cold to the touch, not the weather or something like that (which is 寒い).
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's mnemonic to help you: Something that is really cold to the touch is cold enough to make ice cream with.
ミサキちゃんの手、めっちゃ冷たいね！
Misaki's hands are so cold!
早く飲まないと、スープが冷たくなっちゃうよ。
You should eat the soup soon, or it will end up cold.
冷たいコーヒーのことを、日本語では「アイスコーヒー」と呼びます。
We call cold coffee "ice coffee" in Japanese.
冷たいことを言うようですが、こちらも上からの締めつけがきびしくて色々と難しいんです。
I may sound cold, but I'm under tight control from above, and that makes many things difficult.