weld (n.2) Look up weld at Dictionary.com
"joint formed by welding," 1831, from weld (v.).
weld (v.) Look up weld at Dictionary.com
1590s, "unite or consolidate by hammering or compression, often after softening by heating," alteration of well (v.) "to boil, rise;" influenced by past participle form welled. Related: Welded; welding.
weld (n.1) Look up weld at Dictionary.com
plant (Resedo luteola) producing yellow dye, late 14c., from Old English *wealde, perhaps a variant of Old English wald "forest" (see wold). Spanish gualda, French gaude are Germanic loan-words.