irrationalizev.
/ɪˈraʃənəlʌɪz/ transitive. To render irrational.
ΘΚΠ
the mind > mental capacity > lack of understanding > lack of reason, irrationality > deprive of reason [verb (transitive)]
disrationate1668
derationalize1871
irrationalize1895
1895 A. J. Balfour Found. Belief iv. i 235 To pursue the opposite course would be gratuitously to irrationalise (to coin a convenient word) our scheme from the very start.
1896 Contemp. Rev. Aug. 177 The denial of the postulated reality..irrationalises the whole scheme of things presupposed by our ordinary experience.
This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2021).
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v.1895