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araucaria
Arawak
Arawakan
arb
arbalest
arbiter
arbitrage
arbitrageur
arbitrary
arbitrate
arbitration
arbitration clause
arbitrator
arbor (1)
arbor (2)
Arbor Day
arboreal
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arbitrary

ar·bi·trar·y [ rbə trèrree ]


adjective 
Definition:
 
1. based on whim: based solely on personal wishes, feelings, or perceptions, rather than on objective facts, reasons, or principles
an arbitrary decision

2. random: chosen or determined at random
the arbitrary order of the entries

3. authoritarian: with unlimited power
arbitrary government

4. law not according to rule: based on the decision of a judge or court rather than in accordance with any rule or law
arbitrary arrest

[15th century. < Latin arbitrarius "uncertain, depending on the judgment of an arbiter" < arbiter "judge"]

ar·bi·trar·i·ly [ rbə tráirrəlee ] adverb
ar·bi·trar·i·ness noun
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