Reb Dovid, do you know the shoresh of Dovid and it’s meaning?
Secondly, the piel form of sh-ch-s is used in reference to Hashem Yisborach. The niphal is used for the land and the hiphil is used for the people.
Contrast this with healing where the doctor is piel and Hashem is Kal sometimes with and sometimes without a dagesh,?
Capesci?