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pipe up (B2)

カタカナ: パイプ・アップ

IPA: /ˌpaɪp ˈʌp/

To speak up or offer an opinion, especially after a period of silence or hesitation.

意味: 沈黙やためらいの後に、急に発言したり意見を述べたりすること。

If you have any objections to the plan, now is the time to pipe up. — If you have any objections to the plan, now is the time to speak up.
She rarely pipes up in class, so it was a surprise when she challenged the professor's theory. — She rarely speaks up in class, so it was a surprise when she challenged the professor's theory.
The audience was quiet until someone in the back piped up with a question about the schedule. — The audience was quiet until someone in the back interjected with a question about the schedule.

Japanese translations of Pipe up:

pipe up with (phrasal verb): to suddenly say something specific — "He suddenly piped up with a brilliant idea."
pipe up about (phrasal verb): to start complaining or talking about a topic — "She finally piped up about the lack of supplies."