boil up
verb
boiled up; boiling up; boils up
: to grow toward a dangerous level
He could feel the anger boiling up inside him.
Cite this Entry
“Boil up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boil%20up. Accessed 5 Mar. 2026.
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