快

kuài = ku + ai4

rapid / quick / speed / rate / soon / almost / to make haste / clever / sharp (of knives or wits) / forthright / plainspoken / gratified / pleased / pleasant

快 = 夬 + 忄 : Karl Koala made the mistake to have asked the crystal ball in the airplane's bathroom about his future. After he has seen his fate he quickly and angrily destroys the crystal ball with a flail.

快 character breakdown

快
- 夬
  - 乛
  - 大
    - 一
    - 人
      - 丿
      - ㇏
- 忄

夬

guài = gu + ai4

decisive

夬 = 乛 + 大 : Mnemonic symbol: a crystal ball which will decide for you.

夬 = 乛 + 大 : Gitta Giraffe assumed the throne in the airplanes bathroom. Now she has to decide which tool she will use to enforce her decisions. She asks a crystal ball whether she should use a classical sickle or a rather modern robot.

忄

xi̅n = xi + (e)n1

Kangxi radical 61 (心) as a vertical side element

Looks a bit like a flail.

Characters with 快 as component

筷

kuài = ku + ai4

chopstick

筷 = ⺮ + 快 : In the airplane's bathroom Karl Koala is rapidly manufacturing chopsticks out of a bamboo stick so that he may soon start eating eucalyptus leaves again.