porthole
UK[ˈpɔːt.həʊl]US[ˈpɔːrt.hoʊl]
n
A small, usually circular, window in the side of a ship or aircraft.
n
An opening in a wall or other structure for firing a weapon through; an embrasure.
Morpheme Breakdown
port
hole
port
door, opening
hole
opening
Etymology
The word 'porthole' is a tautological compound, where two elements with similar meanings are combined for emphasis or specificity. Its first element, 'port', derives from the Latin porta (gate), which entered English via Old French in nautical contexts to denote a ship's loading door or an opening in the side. The second element, 'hole', is a native English word from Old English hol, describing an aperture. The compound 'porthole' emerged in the late 15th century, logically describing a "door-hole" or "opening-window" on a ship's side. Over time, its meaning specialized to refer specifically to the glazed, circular windows on vessels and later aircraft, while also retaining an archaic use for defensive openings in fortifications.
Analysis
Structure: port (door, opening) + hole (opening)
- port: From Latin porta meaning "gate, door". In this compound, it functions as the core element indicating an opening or passage.
- hole: From Old English hol meaning "hollow place, cave, orifice". In this compound, it functions as a reinforcing noun, specifying the type of opening.
Examples
The sailor peered through the salt-crusted porthole to see the stormy sea.
Fresh air streamed into the cabin through the open porthole.
The old fortress wall was lined with narrow portholes for archers.