Here is a relevant Gesenius' Hebrew Grammar paragraph on Z(Q in the
Hiphil in Zech 6:8. It is section 53d (p. 145). It gives a bunch of
Hebrew Hiphil verbs that carry much the same meaning as the Qal. Z(Q is
mentioned among them, and "cry out" is given as the meaning. Gesenius
calls them inwardly transitive or intensive Hiphils.