Soy

google

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late 17th century: from Japanese soy, shoy, variant of shō-yu, from Chinese shi-yu, from shi ‘salted beans’ + yu ‘oil’.

wiktionary

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1670s, from Dutch soja, from SatsumaJapanese 醤油( そい, soi) [soj] (a variant of standard Japanese 醤油( しょうゆ, shōyu))

etymonline

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soy (n.)

1670s, saio "soybean-based Asian fish sauce," from Dutch soya, from Japanese soyu, variant of shoyu "soy," from Chinese shi-yu, from shi "fermented soy beans" + yu "oil." Etymology reflects Dutch presence in Japan before English and American merchants began to trade there.