stego-, steg-, stegano- +

(Greek: covering, covered, to cover; roof; by extension, secret, secret writing, applied to a secret code, codes, or ciphers that are hidden)

Closely related to Latin tego-, techo-, "to cover".

Any of several herbivorous dinosaurs of the suborder Stegosauria of the Jurassic to the Cretaceous, having a double row of upright bony plates along the back, long hind legs, a short neck, and a relatively small head.
A “roof” or “roofed (plated) lizard” from Late Jurassic Colorado, Oklahoma, Utah, and Wyoming (USA). This creature was formerly called a Diracodon. Named by Othniel Charles Marsh (1831-1899) in 1877.

A cross reference of other word family units that are related directly, or indirectly, to: "secret, hidden, confidential, concealed": ceal-; clandesti-; crypto-; myster-; occult-; orgy.