渇望 (katsubō: craving, longing, thirsting) to thirst + to desire
The first kanji means “to run dry, thirst.” Not surprising, given the definitions listed for 渇望. But it is surprising to see the water radical
in a kanji that means “to run dry, thirst.” Ah, Henshall says the right-hand side of 渇 (that is, all but
) acts phonetically to mean “to dry up.” So the water in question has dried up. Makes sense now.