supererogator means one who supererogates. Lexicurio rates it Sui generis — a strength score of 98 out of 100.
Why “supererogator” is a great word
SUPEREROGATOR — [Noun] A person who performs acts that go beyond what is required by duty or obligation. From the verb supererogate (from Latin supererogare, “to pay out over and above,” from super- (“over”) + erogare (“to pay out”)) + the agent-noun suffix -or. Unlike an obligator, who performs only what is mandated, or a minimalist, who meets only the baseline, the supererogator is compelled by a private surplus of will. It is the neighbor who shovels your walk before dawn, the stranger who returns a lost wallet and refuses a reward, and the colleague who annotates returned drafts with unrequested insights—a quiet testament that the ledger of human duty can sometimes show a credit.
Etymology
From supererogate + -or.
noun
- One who supererogates.