涸

干涸

gān hé

to dry up

涸泽而渔

hé zé ér yú

see 竭澤而漁|竭泽而渔[jie2 ze2 er2 yu2]

涸辙之鲋

hé zhé zhī fù

lit. a fish in a dried-out rut (idiom)

濡沫涸辙

rú mò hé zhé

to help each other out in hard times (idiom)