The antonyms for the word "re generated" are "destroyed," "ruined," "eliminated," "obliterated," and "annihilated." These antonyms indicate a complete opposite of the meaning of "re generated," which is to revive or rejuvenate. They imply a process of destruction or demolition of something, rather than its restoration or renewal. Using these antonyms in a sentence would indicate the opposite of the positive outcome of regeneration. For example, "The city was destroyed by the hurricane, and it will take years to re-generate what was once there." By using the antonym "destroyed" in place of re-generated, it describes the opposite process of what needs to take place for the city to thrive and regenerate.