This safety valve allows citizens to sound the alarm and challenge those whose views are hateful and totalitarian.
Wood up thar, you Polio—hang on to the safety valve—guess she'll crawl off on her paddles.
So you'll have to be my safety valve, confidant and confessor.
Gauge cocks to indicate the height of water, and a safety valve to regulate the pressure of steam, were employed.
All keyed up for war and no place to 164 go, and this was a kind of safety valve.
I felt that he exercised the safety valve of expressing irritations early.
They do no harm, and are a safety valve which should be understood.
"Probably something was wrong with the safety valve," conjectured Rhoda, building better than she knew.
Watt's brain, working at high pressure, needed a safety valve.
In our simplicity we sit upon the safety valve and then wonder why the boiler bursts.