The Spanish word behind all of this simply means sauce, and further back the Latin word means salted. Hold that: one borrowed word that English has taken up more than once. The first time it came in, it brought a bowl of chopped tomato, onion and to the table. The second time, the same word arrived on a record label, and then on the floor where people were dancing to that record, and finally as a verb for what they were doing. The sources give us the word's history but not the reason the music took it, so the honest picture is one Spanish word being , rather than a sauce turning into a song.
From the word’s history
Wiktionary records salsa as borrowed from Spanish salsa, sauce, from Latin salsus, salted, and notes that English sauce is a doublet of it, arriving by way of Old French. So salsa and sauce are the same word on two different routes.
來源記載 salsa 借自西班牙文 salsa（醬），再往前是拉丁文 salsus（加了鹽的），並指出英文的 sauce 是它的同源雙式詞，走的是古法文那條路。也就是說，salsa 和 sauce 是同一個字走了兩條不同的路進到英文。
Wiktionary, "salsa"
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