duzsuzlaşdırmaq (Azerbaijani) comes from Azerbaijani duzsuzlaşmaq, from Azerbaijani duzsuz, from Old French suz, from Latin subtus, from Latin sub, from Proto-Italic supo, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.
duzsuzlaşdırmaq (Azerbaijani): to desalinate