The word "bonked" is a slang term that means exhausted or tired. Its antonyms would be refreshed, energized, revived, invigorated or rejuvenated. When a person is refreshed, they feel revitalized after rest or sleep. Energized means someone has regained their strength or enthusiasm. Revived is someone who has come back to life or consciousness. Invigorated means to feel animated and full of energy. Rejuvenated means to look or feel younger, better or healthier. Bonked can also mean having sex, and its antonyms would be abstinent, virgin, celibate, and abstemious.