To move in an upward direction; to ascend or climb.
To go towards the attacking goal.
To materialise; to grow stronger.
To move from a sitting or lying position to a standing position; to stand up.
To rise from one's bed (often implying to wake up).
To bring together; to amass.
To gather or grow larger by accretion.
To criticise.
To dress in a certain way, especially extravagantly.
To annoy.
To study with effort or determination (object of study indicated by "up on").
Work.
By extension, analogous to boffin, nerd, smart aleck. Often pejorative.
One who swots.
Vigorous study at an educational institution.