(Aramaic) from an unused root corresponding to tsadah in the sense of intentness; a (sinister) design -- true.
see HEBREW tsadah
H6656. tseda
צְדָא noun [masculine] usually (malicious) purpose (Hebraism from Biblical Hebrew צְדִיָּה, √ I. צדה); — with ה interrogative הַצְדָּא Daniel 3:14; < read הַאַוְדָּא Bev Dr Kmp.