breakneck
US /ˈbreɪk.nek/
UK /ˈbreɪk.nek/

1.
sangat cepat, pesat
dangerously fast
:
•
They drove at breakneck speed down the highway.
Mereka melaju dengan kecepatan sangat tinggi di jalan raya.
•
The company's growth has been at a breakneck pace.
Pertumbuhan perusahaan sangat pesat.