backdoor
UK[ˌbækˈdɔː]US[ˈbækˌdɔːr]
n
A secondary, secret, or indirect means of access or entry, especially one that bypasses usual security or procedures.
n
A hidden or undocumented feature in software or hardware, often used for unauthorized access.
adj
Achieved or done in a secret, indirect, or underhanded way.
Morpheme Breakdown
back
door
back
rear
door
entrance
Etymology
The compound word 'backdoor' is a straightforward combination of two native English words, 'back' and 'door', both of Germanic origin. Literally, it refers to a door at the rear of a building, which historically was a less formal, service, or discreet entrance. This literal sense of a secondary, less conspicuous point of entry provided the perfect metaphor for its modern abstract meanings. Consequently, it evolved to signify any secret or unofficial method of access, a concept now central to fields from diplomacy to computer security, where it denotes a covert method to bypass standard controls.
Analysis
Structure: back (rear) + door (entrance)
- back: From Old English 'bæc', meaning the rear surface of the human body or the corresponding part of anything. Its functional role is adjectival, denoting position or location.
- door: From Old English 'duru' or 'dor', meaning a movable barrier for opening and closing an entrance. Its functional role is nominal, denoting the object of entry.
Examples
The spies used a diplomatic backdoor to exchange information.
The software update accidentally created a security backdoor for hackers.
They reached the agreement through a series of backdoor negotiations.