- 1quickly Don't drive so fast! How fast were you going? I can't go any faster. The water was rising fast. Her heart beat faster. (formal) Night was fast approaching. a fast-flowing stream Which Word?quick / quickly / fast
- Quickly is the usual adverb from quick:I quickly realized that I was on the wrong train. My heart started to beat more quickly.
- Quick is sometimes used as an adverb in very informal language, especially as an exclamation:Come on! Quick! They’ll see us!Quicker is used more often:My heart started to beat much quicker. The quicker I get you away from here, the better.
- Fast is more often used when you are talking about the speed that someone or something moves at:How fast can a cheetah run? Can’t you drive any faster? You’re driving too quickly.There is no word fastly.
- 2in a short time; without delay Children grow up so fast these days. The United States is fast becoming a nation of fatties. The police said that they reacted as fast as they could.
- 3firmly; completely Within a few minutes she was fast asleep (= sleeping deeply). The boat was stuck fast (= unable to move) in the mud. There is no noun related to fast. Use speed in connection with vehicles, actions, etc.;quickness is used about thinking. Idioms
quickly
as quickly as you can
to continue to believe in an idea, etc. despite difficulties
to treat someone or something in a way that shows that you feel no responsibility or respect for them
to refuse to move back; to refuse to change your opinions
quickly and in large quantities Questions were coming at them thick and fast.
Check pronunciation: fast