next-door
UK[ˌnekst ˈdɔː]US[ˌnekst ˈdɔːr]
adj
Located in the next house, building, or apartment
adj
Very close or neighboring
Morpheme Breakdown
next
door
next
following
door
entrance
Etymology
The compound adjective 'next-door' is a transparent combination of two native English elements, 'next' and 'door', which directly describe its meaning. 'Next' evolved from the Old English superlative form meaning 'nearest' or 'closest in order', while 'door' has consistently referred to an entranceway. The literal logic is spatial: the entity closest to one's own door. Over time, this concrete spatial sense expanded to describe any immediately adjacent dwelling or, figuratively, any very close relationship or proximity, effectively metaphorizing physical adjacency into general closeness.
Analysis
Structure: next (following) + door (entrance)
- next: From Old English 'nēhst', 'nīehst', superlative of 'nēah' (nigh, near). Origin: Proto-Germanic. Functional role: Adjective root indicating immediate adjacency in sequence or space.
- door: From Old English 'duru', 'dor', meaning a doorway, gate, or entrance. Origin: Proto-Germanic. Functional role: Noun root referring to a physical barrier or entry point to a building or room.
Examples
My next-door neighbor is very friendly.
She grew up in the next-door apartment.
The two companies have a next-door relationship, collaborating on almost every project.