scrambler

Don knelt and fished from under the other's left arm a vicious-looking short-barrelled scrambler.

This is the tragic side of the scrambler's career, the shadow thrown by almost every one of the class.

"They won't scan through this scrambler, sir," asserted the young officer.

“The speech scrambler is an electric circuit which automatically transposes voice frequencies,” the Commodore resumed.

Dan gulped the last of his coffee, and found a visi-phone booth with a scrambler in working order.