The antonyms for "fed fire" are essentially any word that implies the opposite of nourishing or sustaining a flame. Examples include "extinguished" or "quenched," meaning the fire has been put out or stopped from burning, and "starved" or "deprived," meaning the fire has been denied the fuel or oxygen it needs to keep going. Other antonyms might include words related to cooling or damping, such as "chilled" or "dampened," or words that suggest the absence or cessation of flames, like "cold" or "lifeless." Ultimately, the opposite of "fed fire" is anything that implies a lack of warmth, vitality, or energy.