Where does “irrational” come from?
Irrational comes from Latin irrationalis, formed from the Latin prefix ir- and suffix -alis, derived from Latin in and Proto-Indo-European ne, meaning "not."
irrational (English): Not rational; unfounded or nonsensical; Of a real...
Definitions
- Not rational; unfounded or nonsensical; Of a real...
Ancestry of “irrational”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | Latin | irratiōnālis | irrational |
| 2 | Latin | rationalis | accounts; rational, reasonable, of or possessing... |
| 3 | Latin | ratiō | reason, reasoning, explanation, ground, motive, rationality, rationale, purpose |
| 4 | Latin | -tiō | tion, -ation, -ing |
| 5 | Latin | dissertātiō | (spoken) dissertation, discourse, disquisition |
| 6 | Latin | dissertus | arranged, disposed; explained |
| 7 | Latin | disserere | second-person singular future passive indicative... |
| 8 | Latin | dis- | asunder, apart, in two; reversal, removal;... |
| 9 | Latin | calceus | shoe |
| 10 | Latin | calx | limestone; chalk; the finish line |
| 11 | Ancient Greek | χάλιξ | small stone, pebble; gravel, rubble |