I. ̷ ̷ˈ ̷ ̷ ̷ ̷ ̷ ̷_bəl adjective
Etymology: French or Latin; French, from Latin indubitabilis, from in- in- (I) + indubitabilis dubitable
: not dubitable : not open to question or doubt : to evident to be doubted : unquestionable
there is a core of indubitable knowledge in education, but most of the teacher's task consists in imparting methods for understanding what is still unknown — Zechariah Chafee
• in·du·bi·ta·ble·ness noun -es
II. noun
( -s )
: something that is indubitable