from
The Collaborative International Dictionary of English v.0.48
Incontestable \In`con*test"a*ble\, a. [Pref. in- not +
contestable: cf. F. incontestable.]
Not contestable; not to be disputed; that cannot be called in
question or controverted; incontrovertible; indisputable; as,
incontestable evidence, truth, or facts. --Locke.
Syn: Incontrovertible; indisputable; irrefragable;
undeniable; unquestionable; intuitable; certain. --
{In`con*test"a*ble*ness}, n. -- {In`con*test"a*bly},
adv.
[1913 Webster]