General meaning:
* arriba: This is the most common translation for "up" in general. It means "upwards" or "on top".
* encima: This can be used for "on top of" or "above".
Specific contexts:
* Wake up: despertarse
* Get up: levantarse
* Go up: subir
* Turn up: subir el volumen (for volume) / aparecer (for someone appearing)
* Add up: sumar
* Look up: buscar
* Clean up: limpiar
* Speed up: acelerar
* Back up: hacer una copia de seguridad (for data) / retroceder (for moving backwards)
Phrases:
* Up to: hasta
* Up to date: al día
* Up to you: como tú quieras
* Up and down: arriba y abajo
* Upside down: boca abajo
It's important to consider the context of the sentence to choose the most appropriate Spanish translation for "up."