verb

convert (a coded message) into intelligible language.

he put down the phone and decoded the message

decipher,decrypt,unravel,untangle,work out,sort out,piece together,solve,interpret,translate,construe,explain,understand,comprehend,apprehend,grasp,make sense of,get to the bottom of,find the key to,find the answer to,throw light on,crack,figure out,twig,suss,suss out

noun

a translation of a coded message.

studying reports, poring over decodes