beastly English
Adjective
( enadj)
(UK) Pertaining to, or having the form, nature or habits of, a beast.
(UK) Characterizing the nature of a beast; contrary to the nature and dignity of man; brutal; filthy.
(UK, dated) Abominable.
 beastly weather
Usage notes
Most often used pejoratively. is more narrow, though also often used pejoratively.
Synonyms
* (like a beast) bestial, animalian
Adverb
( en adverb)
Like a beast; brutishly.
* 1590 , (Edmund Spenser), The Faerie Queene , III.8:
 Beastly he threwe her downe, ne car'd to spill / Her garments gay with scales of fish that all did fill.
* 1901 , The Literary World  Volume 63  Page 35:
 They have insulted me most beastly . Moreover, they are, everyone of them, blacksatan filthmen.

irrational English
Adjective
( en adjective)
Not rational; unfounded or nonsensical.
 an irrational decision
* July 18 2012 , Scott Tobias, AV Club The Dark Knight Rises [http://www.avclub.com/articles/thedarkknightrisesreviewbatman,82624/]
 Where the Joker preys on our fears of random, irrational acts of terror, Bane has an allconsuming, dictatorial agenda that’s more stable and permanent, a New World Order that’s been planned out with the precision of a military coup.
(mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the ratio of two integers.
 The number π is irrational .
Antonyms
* (mathematics) rational
Hyponyms
* (mathematics) transcendental
Derived terms
* irrational number
* irrationality
* irrationalize
* irrationalization
Noun
( en noun)
A real number that can not be expressed as the quotient of two integers, an irrational number.
* 1946 , (Bertrand Russell), History of Western Philosophy , I.24:
 The square root of 2, which was the first irrational to be discovered, was known to the early Pythagoreans, and ingenious methods of approximating to its value were discovered.
