駆水 is read as くすい (kusui) and means dehydrating.
くすい
kusui
かける
to advance (against one's enemy)
かけあし
cantering
かけまわる
to run around
かる
to drive at high speed (e.g. a car)
くちく
expulsion
くし
working (someone) hard
くどう
driving force
かけひき
(tactical) advance or retreat of troops
かけこみ
last-minute rush
くじょ
extermination (of pests)
かけつける
to run to
くちくかん
destroyer (ship)