boil up
US /bɔɪl ʌp/
UK /bɔɪl ʌp/

1.
membara, mendidih
to become very angry or excited
:
•
His anger began to boil up when he heard the news.
Kemarahannya mulai membara ketika dia mendengar berita itu.
•
Tensions are starting to boil up between the two groups.
Ketegangan mulai membara di antara kedua kelompok.