password-protected

The term 'password-protected' is a modern compound adjective formed in the late 20th century with the rise of digital security. Its first element, 'password', is itself a centuries-old compound, originally a military term for a secret word allowing passage through a guard post. The second element, 'protected', derives from the Latin 'protegere', meaning to cover or shield, which combines 'pro-' (in front) and 'tegere' (to cover). The logic of the compound is transparent: a system is shielded or covered from unauthorized access by the requirement of a secret pass-word. Thus, the ancient concepts of a verbal token for passage and physical shielding merge into the abstract digital concept of security.

Structure: password (noun) + protected (adjective) password: A compound of 'pass' (Middle English, from Old French 'passer', meaning to go by or through) and 'word' (Old English 'word', meaning speech or utterance). In this compound, it functions as a noun meaning a secret word or phrase used to gain admission. protected: From the verb 'protect', with the suffix '-ed' forming a participial adjective. 'Protect' originates from Latin 'protectus', past participle of 'protegere' (to cover in front, to shield).