firme

fast(adjective)

(of a dye) fixed; that will not come out of a fabric when it is washed.

rápido

fast(adjective)

quick-moving

a fast car.

firme

fast(adjective)

firm; fixed

She made her end of the rope fast to a tree.

rápido

fast(adjective)

quick

a fast worker.

adelantado

fast(adjective)

(of a clock, watch etc) showing a time in advance of the correct time

My watch is five minutes fast.

deprisa

fast(adverb)

quickly

She speaks so fast I can't understand her.

ayuno

fast(noun)

a time or act of fasting

She has just finished two days' fast.

ayunar

fast(verb)

to go without food, especially for religious or medical reasons

Muslims fast during the festival of Ramadan.