swindle

Back-formation from swindler, from German Schwindler, from German schwindeln, from Middle High German swindeln, swindelen, from Old High German swintilōn, frequentative of the verb swintan, from Proto-West Germanic *swindan (“to diminish”). See also Modern German schwindeln, Danish svindel and svindle, Dutch zwindelen and zwendelen, Yiddish שווינדל (shvindl), Low German swinneln, Middle English swinden (“to languish, waste away”).