This entry incorporates text from the public domain Easton's Bible Dictionary, originally published in 1897. Eastons Bible Dictionary generally refers to the Illustrated Bible Dictionary, Third Edition, by Matthew George Easton M.A., D.D. (1823-1894), published three years after Eastons death in 1897 by Thomas Nelson. ...
Therefore shalt thou give <05414> (8799) presents <07964> to Moreshethgath <04182>: the houses <01004> of Achzib <0392> [shall be] a lie <0391> to the kings <04428> of Israel <03478>.
Therefore you shall give presents to Moresheth Gath; The houses of Achzib [shall be] a lie to the kings of Israel.
The point of the metaphor is that Achzib will be as disappointing to the kings of Israel as a dried up spring in the summer is to a thirsty traveler in the Jordanian desert.