Definition of irrecusable in US English:

irrecusable

adjective

rare
  • (of evidence or a statement) not able to be challenged or rejected.

    • ‘Constructing such ‘essences,’ however, will of course provide psychology with the kind of irrecusable data characteristic of natural science.’
    • ‘Isn't the hardness of rock just as irrecusable as the reality of the complex plane?’
    • ‘Lacking written proofs and irrecusable documents, the Nuremberg court was forced to base itself on ‘eyewitness accounts’.’
    • ‘In this paper, I will follow in the steps of several thinkers who have responded to the irrecusable summons of this narrative.’
    • ‘If private credit is not used or rejected, then the operation of law which imposes the irrecusable obligation lies dormant and cannot apply.’

Origin

Late 18th century: via French from late Latin irrecusabilis, from in- ‘not’ + recusabilis ‘that should be refused’ (from the verb recusare).

Pronunciation

irrecusable

/ˌɪrəˈkjuzəb(ə)l//ˌirəˈkyo͞ozəb(ə)l/