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unreasonable
un·rea·son·able adj: not reasonable: beyond what can be accepted: as
a: clearly inappropriate, excessive, or harmful in degree or kind
an unreasonable delay
an unreasonable restraint of trade
b: lacking justification in fact or circumstance
an unreasonable inference; esp: irrational(b)
the agency decision was unreasonable
c: not supported by a warrant or by a valid exception to a warrant requirement (as when there is reasonable suspicion) and therefore unconstitutional
the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violatedU.S. Constitution amend. IV see also search, seizure
un·rea·son·able·ness n
un·rea·son·ably adv

Merriam-Webster’s Dictionary of Law. . 1996.