Past tense of weld; joined metal pieces together by heating and fusing them. Can also mean united or joined firmly together.
From Middle English welden meaning 'to control, rule over,' from Old English wealdan. The modern sense of joining metals developed in the 19th century with industrial metalworking techniques.
Welding is essentially controlled lightning - electric arc welding can reach temperatures of 6,500°F, hotter than the surface of the sun, to melt metals together at the molecular level, creating joints often stronger than the original materials.
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