a. 无疑的, 确实的, 明显的

[法] 不容置疑的, 明确的

[ adj ]
too obvious to be doubted
<adj.all>

Indubitable \In*du"bi*ta*ble\, a. [L. indubitabilis: cf. F.
indubitable. See {In-} not, and {Dubitable}.]
Not dubitable or doubtful; too evident to admit of doubt;
unquestionable; evident; apparently certain; as, an
indubitable conclusion. -- n. That which is indubitable.

Syn: Unquestionable; evident; incontrovertible;
incontestable; undeniable; irrefragable.