to need someone or something to succeed or work well.
We often rely on friends to support us during tough times.
困難な時期に支えてくれる友人を私たちはしばしば頼りにします。
to have confidence in someone or something.
I always rely on my team to finish projects on time.
私は常にプロジェクトを時間通りに終わらせるためにチームを頼っています。