[frosty] adj frost.i.er ; -est (bef. 12c) 1 a: attended with or producing frost: freezing b: briskly cold: chilly
2: covered or appearing as if covered with frost: hoary "a man of 65, with ~ eyebrows and hair --Nan Robertson"
3: marked by coolness or extreme reserve in manner "his smile was distinctly ~ --Erle Stanley Gardner" -- frost.i.ly adv -- frost.i.ness n