escalate

US /ˈɛskəˌlet/

UK /ˈeskəleɪt/

B2
v.t./i.Verb (Transitive/Intransitive)To increase in size, intensity, or scope
I will escalate your problem to my boss who will answer you
v.t./i.Verb (Transitive/Intransitive)To become much worse or more severe
I did not want the argument to escalate into a fight

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