General:
* Up (in the sense of direction)
* Above (in the sense of position)
* High (in the sense of elevation)
Figurative:
* Cheer up! (an encouragement)
* Go! (an exhortation)
* Let's go! (a call to action)
In phrases:
* Arriba, arriba! - This is a common cheer or exclamation meaning something like "Go! Go!" or "Let's go!"
* Arriba y abajo - Meaning "up and down"
The best translation will depend on the specific context in which the word is used.