You might remember the meaning of the character 撤 with this easy mnemonic:
Use the umbrella (扌) to remove the lid (亠) from the private (厶) jar of poison over there. When the moon (月) comes out tonight, we'll slash (丿) your ex's tires and cover his car in poison.
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.