翕動

翕动
xīdòng
to open and close (the mouth etc)

CEDICT

  1. (literary, of lips, nostrils, wings, etc.) to open and close
  2. to open and close

Wiktionary

Entry Composition

1 翕 xī
  1. to open and close (the mouth etc)
  2. friendly
  3. compliant
  4. Taiwan pr. xì
2 動 dòng
  1. (of sth) to move
  2. to set in movement
  3. to displace
  4. to touch
  5. to make use of
  6. to stir (emotions)
  7. to alter
  8. abbr. for 動詞 dòngcí, verb

Related entries

翕 xī
  1. to open and close (the mouth etc)
  2. friendly
  3. compliant
  4. Taiwan pr. xì
開合 kāihé to open and close
開關 kāiguān
  1. power switch
  2. gas valve
  3. to open the city (or frontier) gate
  4. to open and close
  5. to switch on and off
這個裝置是用開關啟動的。

This device is actuated by a switch.

Source: Tatoeba