"Too big to be extinguished at once, the forest fires at best could be contained"
"quench the flames"
"snuff out the candles"
3. electronics: suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device
4. suppress or crush completely;
"squelch any sign of dissent"
"quench a rebellion"
5. reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance