Etymology of the English word rational
the English word
rationalderived from the Old French word
racionelderived from the Latin word
rationalis (measurable; that has a ratio; knowing rationally; rational, of, possessing reason; theoretician; accountant)
derived from the Latin word
ratio (account, reckoning, invoice)
derived from the Latin word
ratus (established, authoritative; fixed; rat)
derived from the Latin word
reri (think, regard; deem)
derived from the Proto-Indo-European root
*ar-Date
The earliest known usage of rational in English dates from the 14th century.
Derivations in English
rationalism,
rationalize,
subrational,
superrational,
suprarationalCognates
Dutch
rationeel, French
rationnel, German
rational, German
rationell, Italian
razionale, Lithuanian
racionalus, Norwegian
rasjonal, Polish
racjonalny, Russian
paциoнaльный, Spanish
racional, Swedish
rationellUsage
Word found in Modern English
