To determine the synonym of the word "Abandon," we need to understand its meaning. "Abandon" means to desert, leave without intending to return, or give up. With this understanding, we can examine the given options to find the word with a similar meaning:
- Keep: This means to retain or hold onto something, which is the opposite of "abandon."
- Leave: This means to go away from or depart, closely aligning with the meaning of "abandon."
- Support: This means to uphold or assist, which does not relate to "abandon."
- Protect: This means to guard or keep safe, differing from the idea of "abandon."
Comparing the meanings, "Leave" is the word that best matches the sense of "abandon," making it the correct synonym.