Overdoer

Part of speech: noun

Definitions

1. An individual who habitually engages in activities with excessive zeal or commitment
2. Someone who consistently carries out tasks or behaviors beyond what is necessary or appropriate
3. A person who often takes part in activities with a level of intensity that surpasses normal limits

Etymology: "Overdoer" is a plain formation: the verb "overdo" with the agent suffix "-er" attached, producing a noun for someone who does something to excess. The verb "overdo" is built from "over," meaning beyond a limit, and "do," so to overdo something is to carry it past what is appropriate or sensible. Adding "-er" turns that action into a person who habitually does so. The suffix does the same job in countless English words, from "baker" to "reader," which is why the formation needs little explanation. The word's meaning comes directly from its two parts: the person in question is the one who goes beyond the normal limit of effort or activity.

Synonyms: overachiever, overperformer, overexertor

Antonyms: underachiever