/ʌnˈriːzənəbl/ – adjective
Definition: Không hợp lý, không hợp lý.
A more thorough explanation: if you think that something is not fair or not sensible then you can say it is unreasonable; unfair; not practical; unacceptable; not what would normally be expected
Example: It is unreasonable to search a person’s home for a murder weapon without a warrant.