indisputable /ˌɪn.dɪˈspjuː.tə.bəɫ/ adjective1 •Not disputable; not open to question; obviously trueNay, if he be of a proud humour, […] he will not Bate an Ace of absolute certainty, but however doubtful or improbable the thing is, coming f[r]om him it must go for an indisputable truth. — 1674 formsmore indisputable · most indisputable