打水
to draw water; to splash water
大水冲了龙王庙
lit. surging waters flooded the Dragon King temple (idiom); fig. to fail to recognize a familiar person; a dispute between close people who fail to recognize each other
打水漂
to skip stones (on water); (coll.) to squander one's money on a bad investment
竹篮打水,一场空
using a wicker basket to draw water (idiom); wasted effort