English
irrational
Irrational comes from Latin irratiōnālis.
- Latinc. 75 BCE–200 CEirratiōnālis
- Englishearliest quotation 1946irrational
attested reconstructed ? uncertain or disputed
Lineage
- Latinc. 75 BCE–200 CEirratiōnālis
- Englishearliest quotation 1946irrational
Earliest quotation: 1946, Bertrand Russell, History of Western Philosophy: “The square root of 2, which was the first…”
Every English word from Latin irratiōnālis
Today it means
adj Not rational; unfounded, nonsensical or wrong-headed.
Language periods are conventional ranges, not dates for this word.
Etymograph / Latin irratiōnālis / irrational