allegorist
annotator
cicerone
clarifier
commentator
critic
cryptanalyst
cryptographer
decoder
definer
demonstrator
demythologizer
diaskeuast
dragoman
editor
emendator
emender
euhemerist
exegesist
exegete
exegetist
explainer
explicator
exponent
expositor
expounder
go-between
guide
hermeneut
interpreter
lexicographer
metaphrast
oneirocritic
paraphrast
scholiast
textual critic
translator
decipherer