The word "re-gain" means to retrieve or recover something previously lost. Its antonyms, on the other hand, are words that express the opposite meaning. These include words such as "lose," "surrender," "forfeit," "relinquish," and "forgo." These words indicate giving up or letting go of something, rather than recovering it. Losing something can cause disappointment, but it's important to remember that setbacks are often temporary and can be overcome. By acknowledging the antonyms of "re-gain," we can better understand the importance of perseverance and determination in achieving our goals.