undeˈbatable, a.
(un-1 7 b.)
Also, in recent use, undebatably adv.
| 1869 F. W. Newman Misc. 200 Seas, Desarts or great Mountain ranges have always been the chief arbiters in this undebateable question. 1898 Mission. Herald (Boston) Mar. 104/2 The pastors settled it by saying it was undebatable. |