Door open quickly.

Meaning: This means to move the movable barrier that closes an entrance to a room or building at a fast pace. It's like saying, Move the movable barrier that closes an entrance to a room or building at a fast pace.

Choice of Words: Door is a noun that refers to a movable barrier that closes an entrance to a room or building. Open is a verb that means to move something so that there is a space or gap. Quickly is an adverb that means to do something at a fast pace. When you put them together, "Door open quickly" means to move the movable barrier that closes an entrance to a room or building at a fast pace.

Alternative Expressions

Related Expressions