This character means "drop" as in "drop of water".
Mnemonic
[di-] Diddy Kong is in [1] front of the [-_] house where he finds a strange 啇 antique that is in the middle of the lawn that keeps on 氵 spraying off water as though it is some sort of lawn sprinkler. Diddy Kong goes over to it and takes out a banana and squeezes out a single 滴 drop of banana juice onto it. That single 滴 drop stops the 啇 antique from 氵 spraying.