と努めた

tried to…

→ と
phrase Rare #27,692
tried to… Follows a verb in its volitional form to describe making an effort to do something.
JA: 彼女は笑顔でいようと努めた。
EN: She tried to keep smiling.

自分の意思を伝えようと努めたが無駄だった。

I tried to communicate my intentions, but it was pointless.

私は彼の言う事を注意深く聞こうと努めた。

I tried to listen carefully to what he was saying.

私は彼女が涙を流した思い出を忘れようと努めた。

I tried to forget the memory of her crying.