Keyholes

Part of speech: noun

Definitions

1. A cylindrical opening fitted within a locking device, allowing a key to engage the mechanism; a designed recess creating a path for a key to access a lock; a specifically shaped aperture facilitating the insertion of a key into its corresponding lock system
2. Openings in locks shaped to allow keys to be inserted and turn the locking mechanism
3. Narrow apertures designed to receive a key and activate the associated lock system

Etymology: The plural form of a common compound noun, this word combines "key" and "hole" to describe the small opening into which a key is inserted to operate a lock. The base word "key" derives from Old English "cæg," which referred to a device for opening locks, with roots tracing back to Proto-Germanic "*kagjō." Meanwhile, "hole" comes from Old English "hol," meaning a hollow place or opening. The concept behind the term dates back to the development of locks and keys in antiquity, where openings were necessary to insert keys and manipulate internal mechanisms. The word itself likely entered regular use in English from the Middle Ages onward, as locks became more sophisticated and widespread in Europe. In forming the plural, the simple addition of "-s" to "keyhole" follows the standard English rule for countable nouns. The term thus straightforwardly refers to multiple such openings, whether on doors, chests, or other secured objects. Though its components are individually old and well-documented, the compound term is a practical coinage reflecting everyday experience rather than a word with a particularly dramatic or literary origin. Its usage has remained stable, firmly tied to the physical object it denotes.

Synonyms: lock openings, entry points