A coded message is an example of something cryptic.
A letter written in invisible ink is an example of something cryptic.
Lonomia caterpillars are extremely cryptic.
Origin of cryptic
- Late Latin crypticus from Greek kruptikos from kruptos hidden from kruptein to hide
From American Heritage Dictionary of the English Language, 5th Edition
- From Late Latin crypticus, from Ancient Greek κρυπτικός (kruptikos), from κρυπτός (kruptos, “hidden”), from κρύπτω (kruptō, “to hide”). Also see: cryptology.