Merriam-Webster's Collegiate® Dictionary, 11th Edition
PALSY
I. noun (plural palsies)
Etymology: Middle English palesie, alteration of parlesey, from Anglo-French paralisie, from Latin paralysis
Date: 14th century
paralysis , a condition marked by uncontrollable tremor of the body or a part,
II. transitive verb (palsied; palsying)
Date: 1615
to affect with or as if with palsy,
III. adjective
Date: 1951
palsy-walsy