To grant or fulfill a request, wish, or prayer; to make a desire come true (commonly written 叶える).
親は子どもの夢を叶えるために全力を尽くした。
Parents did their utmost to help their child's dream come true.
彼女の願いを叶えるために、みんなでサプライズパーティーを計画した。
To grant her wish, everyone planned a surprise party.
このプロジェクトは若者の希望を叶える一歩になるだろう。
This project will likely be a step toward fulfilling young people's hopes.
To fulfill or meet conditions or requirements; to satisfy criteria (often written 適える for this nuance).
このソフトは顧客の要望を適えるように設計された。
This software was designed to meet the customer's requirements.
応募条件を適える人だけが次の選考に進める。
Only those who meet the application criteria can proceed to the next selection stage.
彼は会社の期待を適えるために努力を続けた。
He continued to strive to meet the company's expectations.