That’s what I do I weld I drink I hate people and I know things shirt. The word is derived from the Old Swedish word valla, meaning “to boil”. Sweden was a large exporter of iron during the Middle Ages, and many other European languages used different words but with the same meaning to refer to welding iron, such as the Illyrian (Greek) variti (to boil), Turkish kaynamak (to boil) , Grison (Swiss) bulgir (to boil), or the Lettish (Latvian) sawdrit (to weld or solder, derived from wdrit, to boil).
In Swedish, however, the word only referred to joining metals when combined with the word for iron (järn), as in valla järn (literally: to boil iron). The word possibly entered English from the Swedish iron trade, or possibly was imported with the thousands of Viking settlements that arrived in England before and during the Viking Age, as more than half of the most common English words in everyday use are Scandinavian in origin.