hiss: or, signal. The figure is borrowed from bee -keepers (Isaiah 5:26; Isaiah 7:18).
have increased. did increase [before]. Compare Ex, Zechariah 1:7.
Related Commentaries of Zechariah 10:8
Zechariah 10:8
8 I will hiss for them, and gather them; for I have redeemed them: and they shall increase as they have increased.