Please tell me the meaning of this word.

What does this word mean?

His words always resonate in my heart.

His kindness is so great that it's unable to put into words.

His kindness is so great that it's unable to put into words.

I saw a beautiful butterfly in the park.

I saw a beautiful butterfly in the park.

When he opened the window, fresh air flowed into the room.

He is working tirelessly.

When spring comes, cherry blossoms bloom.