verb (used with object), un·scram·bled, un·scram·bling.
1.
to bring out of a scrambled condition; reduce to order or intelligibility.
2.
Also, descramble.to make (a scrambled radio or telephonic message) comprehensible by systematically tuning the receiver to the frequencies used in transmission. Compare decode( def 2 ).
"restore to order," 1923, from un- (2) + scramble (v.). The original notion probably is from the old retort about the impossibility of unscrambling eggs.