1
Stage 1 of 3
solidus
Latin · ancient
"solid, whole"
solid, whole, giving rise to solidare (to make solid)
2
Stage 2 of 3
souder
Old French · medieval
"to join metal pieces by fusing them"
carried into French for joining metal pieces by fusing them, from solidare
3
Stage 3 of 3
solder
English · 1300s
"to join metal pieces using a fused metal alloy"
settled as the English word for joining metal pieces with a fused metal alloy
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