同义词： fasting

• abstain from certain foods, as for religious or medical reasons

  "Catholics sometimes fast during Lent"

• abstain from eating

  "Before the medical exam, you must fast"

• acting or moving or capable of acting or moving quickly

  "fast film"; " on the fast track in school"; " set a fast pace"; " a fast car"

• (used of timepieces) indicating a time ahead of or later than the correct time

  "my watch is fast"

• at a rapid tempo

  "the band played a fast fox trot"

• (of surfaces) conducive to rapid speeds

  "a fast road"; " grass courts are faster than clay"

• firmly fastened or secured against opening

  "windows and doors were all fast"

  同义词： barred bolted latched locked secured

• resistant to destruction or fading

  "fast colors"

• unrestrained by convention or morality

  "fast women"

  同义词： debauched degenerate degraded dissipated dissolute libertine profligate riotous

• hurried and brief

  "a fast visit"

  同义词： flying quick

• securely fixed in place

  同义词： firm immobile

• unwavering in devotion to friend or vow or cause

  "fast friends"

  同义词： firm loyal truehearted

• quickly or rapidly (often used as a combining form)

  "how fast can he get here?"; " ran as fast as he could"; " needs medical help fast"; " fast-running rivers"; " fast-breaking news"; " fast-opening (or fast-closing) shutters"

• firmly or tightly

  "held fast to the rope"; " her foot was stuck fast"

  同义词： tight