Emily Dickinson Lexicon

SOD'ER, v.t. [W. sawd, juncture; sawdriaw, to join, to soder; Fr. souder; Arm. souda or soudta; It. sodare, to make firm. It has been taken for granted that this is a contracted word, from L. solido, and hence written solder. The fact may be doubted; but if true, the settled pronunciation seems to render it expedient to let the contracted orthography remain undisturbed. So Parkhurst writes it. Lexicon, דבק.]

To unite and make solid, as metallic substances; to join separate things or parts of the same thing by a metallic substance in a state of fusion, which hardens in cooling, and renders the joint solid.