Select the related word from the given alternatives:

Solution

Ephemeral means lasting for a very short time. Perpetual means occurring repeatedly or lasting forever. Relationship: These two words are antonyms (opposites). Zenith refers to the highest point reached by an object or the time at which something is most powerful or successful. Apex and Summit are synonyms of Zenith (highest point). Horizon refers to the line at which the earth's surface and the sky appear to meet. Nadir refers to the lowest point in the fortunes of a person or organization. Conclusion: Just as "Perpetual" is the opposite of "Ephemeral," "Nadir" is the opposite of "Zenith."