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upsurge

1 ENTRIES FOUND:
upsurge /ˈʌpˌsɚʤ/ noun
plural upsurges
upsurge
/ˈʌpˌsɚʤ/
noun
plural upsurges
Britannica Dictionary definition of UPSURGE
[count]
: a rapid or sudden increase or rise usually + in or of