atrásadverb

Atrás means back, behind, backward or ago (after a time expression) in English. It is an adverb.

Tuve miedo y miré atrás.

I was scared and looked back.

Sube al asiento de atrás.

Get in the back seat.

Detengan la cuenta atrás.

Stop the countdown.

Da dos pasos hacia atrás.

Take two steps backwards.