To Grant
To Fulfill
transitive verb, ichidan verb
The kanji means "come true" or grant, and this is the transitive verb version of that, making this to grant or to fulfill.
叶える refers to making something desired come true, either for oneself or someone else. It's usually used in the context of fulfilling wishes, dreams, or goals, but it can also be used for granting someone's request in more formal contexts.
This is a verb, so it uses the kun'yomi reading. Luckily, you already learned this with the kanji, so you should be good to go here!
夢を叶える
to fulfill a dream
願いを叶える
to fulfill a wish, to grant someone's request
希望を叶える
to fulfill a hope, to grant someone's request
目標を叶える
to achieve a goal
ゼッタイにこの夢を叶えるんだ！
I will make this dream come true no matter what!
あなたは、いつまでにその目標を叶えたいですか？
When do you want to achieve that goal by?
全ての希望を叶えることはできないかもしれません。
It may not be possible to fulfill all your wishes.