English

pseudorational

From pseudo- + rational.

Ancient Greek ψεύδω ‘to lie’

Ancient Greek ψευδής ‘false, lying’

Proto-Indo-European *h₂er- ‘to fit, to fix, to put together, to slot’

Latin reor ‘to compute’

Latin ratio ‘reason’

Latin rationalis ‘of or belonging to reason, rational, reasonable’

Old French rationel

Today it means

adj Supposedly, but not actually, rational; having only a veneer of reason or logic.

Language periods are conventional ranges, not dates for this word.

Etymograph / pseudorational