old man's pepper

== English == === Etymology === Compound of old +‎ man's +‎ pepper, presumably so-called for its pungent flavor (see quotations below). === Noun === old man's pepper (uncountable) Achillea millefolium or common yarrow, a flowering plant native to temperate regions of the Northern Hemisphere. ==== Translations ==== === References === “old-man’s-pepper”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.