楔

xie̅ = xi + e1

wedge / to hammer in (variant of 揳[xie1])

楔 character breakdown

楔
- 契
  - 大
    - 一
    - 人
      - 丿
      - ㇏
  - 㓞
    - 丰
      - 三
        
        一
        
        二
        
        一
      - 丨
    - 刀
      - 丿
      - ㇆
        
        一
        
        亅
- 木
  - 八
    - 丿
    - ㇏
  - 十
    - 一
    - 丨

qì = qi + Ø4

to carve / carved words / to agree / a contract / a deed

契 = 㓞 + 大 : Mnemonic symbol: a written deed.

The robot (大) and the Queen of Hearts (qi) reached an agreement in the space station's bathroom (Ø4). Lacking a proper pen they sign their written deed (契) with an engraver (㓞).

木

mù = mu + Ø4

(bound form) tree / (bound form) wood / unresponsive; numb; wooden

木 = 八 + 十 : Mnemonic symbol: a Christmas tree.

Malte Monkey (mu) is setting up a Christmas tree (木) in the bathroom of the space station (Ø4). He decorates the tree with eight-balls (八) and puts a holy cross (十) at the top of the tree.