to boil up
(of a situation or feeling) to start to get out of control and reach a more dangerous state
[Verb]
to freeze up
to become solid or immobile due to cold temperatures, often leading to a lack of functionality
[Verb]

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(of a situation or feeling) to start to get out of control and reach a more dangerous state
to become solid or immobile due to cold temperatures, often leading to a lack of functionality