A scrambler is an electronic device which alters the sound of a radio or telephone message so that it can only be understood by someone who has special equipment.
scrambler in British English
(ˈskræmblə)
noun
1.
a plant that produces long weak shoots by which it grows over other plants
2.
an electronic device that renders speech unintelligible during transmission, normal speech being restored at the receiving system
Examples of 'scrambler' in a sentence
scrambler
She flicked the scrambler on and waited until the green confidence light blinked.
Terman, Douglas CORMORANT (2001)
`No need to lock your door and switch on your scrambler, I'm not after His Lordship.
Anthony Masters CASCADES - THE DAY OF THE DEAD (2001)
His eyes went from the wall clock to the red scrambler phone on his desk.