donderbus

The word blunderbuss is an anglicized form of Dutch donderbus — a compound of donder (thunder) and bus (gun, box, or tube), literally meaning thunder gun or thunder tube. The Dutch donder is cognate with English thunder, both descended from Proto-Germanic *þunraz, the thunder god whose name also gave us Thursday (Thor's day) and the English words thunder, thunderbolt, and astonish (from the Latin for 'struck by thunder'). Dutch bus, meaning a box, tube, or firearm barrel, comes from Latin buxus (box tree, box), the same root that gives English the word box. A donderbus was thus, literally, a tube that makes thunder.

The weapon itself was a short-barreled firearm with a distinctive flared or bell-shaped muzzle, designed to scatter a charge of multiple projectiles — lead shot, nails, stones, or whatever was available — over a wide area at close range. It was the shotgun of the seventeenth century, optimized not for accuracy but for maximum destructive effect in enclosed spaces: defending a doorway, sweeping a ship's deck, clearing a narrow corridor. Dutch gunsmiths developed and refined the design in the early seventeenth century, and the weapon spread through European armies and navies as a standard defensive arm for coaches, ships, and fortified positions.

English borrowed the word, typically spelled blunderbuss or blunderbuss, in the mid-seventeenth century. The first element shifted from donder (thunder) to blunder — a folk etymology that was probably influenced by the weapon's notoriously inaccurate nature. A blunderbuss was not aimed; it was pointed in a general direction and fired, relying on the spread of its shot rather than the shooter's precision. The word blunder, meaning a clumsy mistake, thus attached itself to the first element, creating a compound that perfectly described both the gun's mode of operation and the user's relationship to accuracy. The word blunder itself derives from Old Norse blundra, meaning to shut one's eyes or stumble blindly.

By the eighteenth century blunderbuss was well established in English for the weapon, which remained in use on English stagecoaches and mail coaches as a guard's weapon well into the nineteenth century — the short barrel was practical in the confined box of a coach, and the wide spread of shot was reassuring against highwaymen at close range. But the word also quickly developed a metaphorical sense, applying to any person or thing that operates clumsily and without precision, achieving its ends (if at all) by brute force and wide dispersal rather than accuracy. A blunderbuss of a politician, a blunderbuss approach to management — the weapon became an image of confident, noisy incompetence.