Topic: Synonyms, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The word "perpetual" refers to something that is everlasting or continual, often implying an endless duration without interruption. Among the provided options, "everlasting" is the most accurate synonym for "perpetual."

While "firm," "equable," and "steady" connote stability or consistency, they do not capture the essence of endlessness that "perpetual" conveys. "Firm" suggests strength or solidity but lacks the temporal aspect. "Equable" refers to a state of calmness or evenness, which again doesn't relate to duration. "Steady," like "firm," indicates stability but lacks the sense of an infinite timeframe.

In contrast, "everlasting" clearly conveys the idea of something that lasts indefinitely, aligning perfectly with the definition of "perpetual." This sense of timelessness is critical when discussing concepts that endure beyond usual limits, such as ideas, relationships, or natural phenomena. Thus, the correct synonym for "perpetual" is aptly identified as "everlasting."