upsurge
US /ˈʌp.sɝːdʒ/
UK /ˈʌp.sɝːdʒ/

1.
peningkatan, lonjakan, gelombang naik
an upward surge in the strength or quantity of something; an increase
:
•
There has been an upsurge in violent crime.
Terjadi peningkatan kejahatan kekerasan.
•
The company experienced an upsurge in sales after the new marketing campaign.
Perusahaan mengalami peningkatan penjualan setelah kampanye pemasaran baru.