to bottle up

https://tts.langeek.co/read?text=dG8gYm90dGxlIHVw&hash=b3bbb8ddf43562697d244a4266c262624b47db63&lang=en&cache-only=0&driver=googletts

Learn phrasal verbs with up related to stopping, ending, completing, postponing, delaying, and bringing activities or processes to a close.