versipellous

Etymology
Formed from versi- ‘turning, changing’ (combinatory form of Latin versus ‘turn’) + ultimately Latin pellis ‘skin’. (Used initially as a word of unknown origin in Nathaniel Ward's Discolliminium, or A Most Obedient Reply to a Late Book called 'Bounds and Bonds' By B)

Adjective

 * 1)  changeable; protean; having a form, nature or appearance that changes often