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