PEAT

I. noun Usage: often attributive Etymology: Middle English pete piece of ~, from Medieval Latin peta, probably of Celtic origin; akin to Cornish peyth bit, Welsh peth thing Date: 14th century turf 2b, partially carbonized vegetable tissue formed by partial decomposition in water of various plants (as mosses of the genus Sphagnum ), ~y adjective II. noun Etymology: origin unknown Date: 1599 a bold lively woman