This is the 3126th most frequent Spanish word.
sube
"Sube" means "goes up," "rises," or "climb" (third person singular present tense of "subir").
Here, 'sube' is used to indicate the action of ascending or climbing—physically moving upwards on the hill.
Él sube la colina con dificultad.
He climbs the hill with difficulty.
In this case, 'sube' is used in the context of data transfer, meaning to upload or transfer files to an online platform.
Sube las fotos al servidor, por favor.
Please upload the photos to the server.
In this context, 'sube' describes something increasing, specifically the temperature rising.