Etymograph

English

irrationable

Irrationable comes from Latin irratiōnābilis ‘irrational, unreasoning, unreasonable’.

  1. Latinc. 75 BCE–200 CEirratiōnābilis‘irrational, unreasoning, unreasonable’
  2. Englishearliest quotation 1860irrationable

attested reconstructed ? uncertain or disputed

Lineage

  1. Latinc. 75 BCE–200 CEirratiōnābilis‘irrational, unreasoning, unreasonable’
  2. Englishearliest quotation 1860irrationable

Earliest quotation: 1860, Robert James Mann, A guide to the knowledge of life: “Operations that are perfected in the economies of the…”

Today it means

adj Not rational.

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

Etymograph / Latin irratiōnābilis / irrationable