What is the purpose of suffix in persevere?

The suffix "-er" in "persevere" is not actually a suffix in the traditional sense. It's part of the root word "severe," which is a Latin word meaning "strict" or "firm."

The word "persevere" comes from the Latin "perseverare," which combines the prefix "per" (meaning "through" or "completely") with "severare."

Therefore, the "-er" in "persevere" is not a separate suffix, but rather part of the root word that contributes to the overall meaning of "to persist in a course of action despite difficulty."