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Upsurge
01
nagły wzrost, nieoczekiwany wzrost
an abrupt increase in strength, number, etc.
Example
There was an unexpected upsurge in stock prices following the positive earnings report.
The city has seen an upsurge in tourism after the new amusement park opened.
The health department is concerned about the recent upsurge in flu cases this season.
02
wzrost, szybki wzrost
a sudden forceful flow
