せいせい
feeling refreshed; feeling relieved
Also written 清清、晴々、晴晴
Adverb (-to), Adverb, Suru verb
清々せいせいしたよ。
Good riddance.
言いいたいことぶちまけたら、清々せいせいしたよ。
I felt quite relieved after I had said all I wanted to say.
彼かれがいなくなってせいせいした。
It's nice to be rid of him!