陀飞轮

陀飛輪
tuófēilún

tourbillon

Wiktionary

Entry Composition

=1 陀 tuó
  1. (phonetic)
  2. declivity
  3. steep bank
=1 陀 duò
  1. (literary) to collapse
  2. to collapse
2 飞轮 fēilún
  1. flywheel
  2. freewheel; cassette (of a bicycle)
  3. fast-moving bike