Bizarre , for example, comes from the Basque word bizar or beard , because when Spanish soldiers arrived in the remote and clean - shaven villages of the Pyrenees, the locals thought that their bizars were bizarre .
The feathers that were stuck into the back of arrows were known by the Romans as the beard , or barbus , which is why arrows are barbs , and that’s ultimately the reason that barbed wire is simply wire that has grown a beard.
Italy was overrun by tribesmen who had huge long beards which they never even trimmed. These tribesmen were known as the longa barba , or longbeards , which was eventually shortened to Lombard , which is why a large part of northern Italy is still known as Lombardy.
Cancer is the crab largely because Galen thought that some tumours resembled crabs and partly because both words come from the Indo - European root qarq , which meant hard.
People didn’t used to write 1 + 1, they would write the sentence I et I , which is Latin for one and one . To make the plus sign, all they did was drop the e in et and leave the crossed +
Average has an even more mundane explanation. It comes from the Old French avarie , which meant damage done to a ship . Ships were often co - owned and when one was damaged and the bill came in for repairs, each owner was expected to pay the average .
Calculus is a formidable word that loses some of its grandeur when you realise that a calculus is just a little pebble, because the Romans did their maths by counting up stones.
Oddly, an abacus, which you might reasonably have expected to mean little pebbles , comes ultimately from the Hebrew word abaq meaning dust . You see, the Greeks, who adopted the word, didn’t use pebbles; instead they used a board covered with sand, on which they could write out their calculations.