Root: גלה (Part A) / צדק (Part B) | Stem: Hithpael
Write the Hithpael Weak forms. Part A uses גלה (III-ה). Part B shows the metathesis rule: when R1 = ז, צ, שׁ, or שׂ, the הִתְ prefix undergoes metathesis (הִצְטַדֵּק).
Metathesis rule: When R1 is ז, צ, שׁ, or שׂ — the ת of הִתְ and R1 switch places: הִתְ + צדק → הִצְטַדֵּק. With שׁ the ת also assimilates: הִשְׁתַּמֵּר.