smoothbore
UK[ˈsmuːðbɔː]US[ˈsmuːðbɔːr]
adj
(of a gun) having a barrel with a smooth interior surface without rifling.
n
a smoothbore gun.
Morpheme Breakdown
smooth
bore
smooth
even
bore
hole
Etymology
the term 'smoothbore' is a transparent compound from middle english, directly combining the old english elements for a level surface and a drilled hole. it emerged as a technical descriptor in the history of firearms, specifically to contrast with the later development of 'rifled' barrels which have spiral grooves. the literal logic is perfectly preserved: a gun with a smooth interior bore. this compound exemplifies how english creates precise terminology by combining native descriptive words to define a technological feature.
Analysis
Structure: smooth (even) + bore (hole)
smooth: from old english 'smōth', meaning having an even, regular surface; free from projections or indentations. functions as an adjective describing a quality.
bore: from old english 'borian', meaning to pierce or perforate; in this context, it refers to the interior of a gun barrel. functions as a noun denoting the hollow part.
Examples
the musket was a common type of smoothbore firearm used in the 18th century.
modern tanks sometimes use smoothbore cannons to fire kinetic energy penetrators.
before the invention of rifling, all artillery pieces were smoothbore.