/ dɪˈsaɪfə(r); NAmE / verb
[ vn ] to succeed in finding the meaning of sth that is difficult to read or understand :
to decipher a code
Can anyone decipher his handwriting?
—see also indecipherable
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WORD ORIGIN
early 16th cent.: from de- (expressing reversal) + cipher , on the pattern of French déchiffrer .