空

empty / air / sky / in vain

空 = 工 + 穴 : Mnemonic symbol: an air conditioner

空 = 工 + 穴 : In front of the engine, Karl Koala found some very special cave paintings. Using steel beams he constructs a protective cover. He also installs air conditioning to make the best environment possible to preserve the cave paintings.

空

kòng = ku + (e)ng4

to empty / vacant / unoccupied / space / leisure / free time

空 character breakdown

空
- 工
  - 丨
  - 二
    - 一
- 穴
  - 八
    - 丿
    - ㇏
  - 宀
    - 丶
    - 冖

工

go̅ng = gu + (e)ng1

work / worker / skill / profession / trade / craft / labor

工 = 二 + 丨 : Mnemonic symbol: a steel beam, since 工 looks like the cross section of a steel beam.

Gitta Giraffe (gu) is working a shift in front of the engine ((e)ng1). Her job is to melt dinosaur bones (丨) so that they can be disposed off easily. To melt the bones, she is shorting a huge capacitor (二) with a steel beam (工) which consequently heats up to a bright glow. Using the glowing hot steel beam she can melt the dinosaur bone easily.

穴

xué = xu + e2

cave / cavity / hole / acupuncture point / Taiwan pr. [xue4]

穴 = 八 + 宀 : Xu Xian presents his newest piece of art: Cave paintings painted on a gigantic eight-ball. Somehow he managed to set it up inside the elevators entrance. For his great artistic achievement, he gained a honorary doctor, and proudly wears his hard earned graduation cap.