verb
R
To make someone feel very happy.
The news of their engagement will overjoy their families.
彼らの婚約の知らせは家族を大変喜ばせるでしょう。
R
To feel very happy about something.
They will overjoy at the sight of their newborn baby.
彼らは自分の新生児を見て大喜びするでしょう。
translation
非常に幸せにする, 何かについて非常に幸せに感じる