lean-to

This term describes a rudimentary architectural structure characterized by its dependence on an existing wall for support. It evokes a sense of utility and improvisation, often associated with rural settings, gardening, or temporary encampments where a full four-walled building is unnecessary. As a noun, it follows standard countability rules, though it is frequently used in the singular to describe a specific addition to a property. The hyphenation is essential to maintain its identity as a compound noun rather than a verb phrase.