HSK东西词典: 蹑

足 jù/zú, excessive, foot/to be sufficient/ample
- 口 kǒu, mouth/classifier for things with mouths (people, domestic animals, cannons, well...
- 止 zhǐ, to stop/to prohibit/until/only
聂 Niè/niè, [聶], surname Nie, to whisper
- 双 Shuāng/shuāng, [雙], surname Shuang, two/double/pair/both/even (number)
  - 又 yòu, (once) again/also/both... and.../and yet/(used for emphasis) anyway
- 耳 ěr, ear/handle (archaeology)/and that is all (Classical Chinese)

蹑 ⇒
蹑手蹑脚 nièshǒunièjiǎo, [躡手躡腳], to walk quietly on tiptoe (idiom)
蹑 niè, [躡], to walk on tiptoe/to walk quietly/to tread (on)/to follow