啮

嚙

niè = ni + e4

to gnaw / to erode

啮

囓

niè = ni + e4

variant of 嚙|啮[nie4] / to gnaw

啮 character breakdown

啮
- 口
- 齿
  - 人
    - 丿
    - ㇏
  - 凵
  - 止
    - 一
    - 上
      - 一
      - 丨
      - 二
        
        一
      - 丄
        
        一
        
        丨
    - 丨
    - ⺊
      - 一
      - 丨
    - 丄
      - 一
      - 丨

口

kǒu = k + ou3

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

Mnemonic symbol: 口 shall be represented by a mandarin. Karl Marx (k-) is enjoying a mandarin in the outhouse's living room (ou3).

齿

齒

chǐ = ch + Ø3

tooth / CL:顆|颗[ke1]

齿 = 止 + 凵 + 人 : Charlie Chaplin (ch) has an aching tooth (齿), and Neanderthal Man (人) is about to help him take it out using an electrical barrier (止) in the space station (Ø3). They attached the barrier to the tooth and as Neanderthal Man will plug it into the receptacle (凵), the barrier will pull out the tooth.