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fast adjective

  /fæst/ , /fɑːst/
  • Moving with great speed, or capable of doing so; swift, rapid. [from 14th c.]
 rápido, veloz

fast verb

  /fæst/ , /fɑːst/
  • (transitive, sciences) To cause (a person or animal) to abstain, especially from eating.
 ayunar

fast adverb

  /fæst/ , /fɑːst/
  • Quickly, with great speed; within a short time [from 13th c.].
 rápidamente
  • In a firm or secure manner, securely; in such a way as not to be moved; safe, sound [from 10th c.].
 firmemente
  • (of sleeping) Deeply or soundly [from 13th c.].
 profundamente

fasting noun

  /ˈfæstɪŋ/ , /ˈfɑːstɪŋ/
  • Abstinence or mortification for religious reasons, especially abstinence from food.
  • Abstinence from food, limiting caloric intake, for medical or health reasons, dieting.
 ayuno

fastness noun

  /ˈfæs(t)-/ , /ˈfæs(t)nəs/ , /ˈfɑːs(t)nəs/
  • (archaic) Of a fortress or other place: the quality or state of being secure from access or attack; safety, security.
 fortaleza
break one's fast
desayunar
fast food
comida rápida, platos preparados
hard-and-fast
estricto, rígido
lightning fast
fulminante
fast track
de vía rápida, vía rápida, acelerar, agilizar, apurar, por la vía rápida
pull a fast one
colar / meter un gol a, dar calote, decebir, engañar, jugársela a, llevar al huerto
not so fast
no tan deprisa
fast lane
carril de alta velocidad
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