ಅರ್ಥ : Something that restrains a flood or outpouring.
ಉದಾಹರಣೆ :
Suspension of surveillance opened the floodgates to illegal immigrants.
ಅರ್ಥ : Regulator consisting of a valve or gate that controls the rate of water flow through a sluice.
ಸಮಾನಾರ್ಥಕ : head gate, penstock, sluice valve, sluicegate, water gate