the owl, for all his feathers, was acold John Keats
Word History
Etymology
Middle English acoiled, a cold, from a- a- entry 1 + cold cold entry 1 (or alternatively continuing acoled, past participle of acolen "to become colder, cool off," going back to Old English ācōlian, from a-, ā-, perfective prefix + cōlian "to become cold") — more at abide, cool entry 2