The word is empty.
gamut
alive
In
The opposite of "full" that has five letters is "empty." It describes a state where something contains nothing or is devoid of content.
M & t
stuffed
occupiedFull, occupied, overflowing...
Savvy.
if someone is "full of bravery" then the opposite is "full of cowardice"
The opposite of a full moon is a new moon.
Opposites could be full, or filled.For metaphorically empty (hollow), the opposite could be meaningful.For empty, specifically of people, the opposite could be populated, or occupied.the oppisite of empty is full
The word "discount" (discounted) means at less than full price, often defined as a percentage reduction from the full price.