to discuss something without reaching a conclusion
結論に達することなく何かを議論する (ketsuron ni tassuru koto naku nanika wo giron suru)
"We talked in circles for hours but didn’t solve anything."
"私たちは何時間もぐるぐる話し続けましたが、何も解決しませんでした。" (watashitachi wa nanjikan mo guruguru hanashitsuzukemashita ga, nanimo kaiketsu shimasendeshita)
past one's prime; no longer young or at peak performance
to suddenly become very nervous or afraid
to change your opinion or attitude
to take advantage of the present moment
to join someone’s online activity or conversation uninvited
To do what one has promised.