Required by a legal, moral, or other rule; compulsory.

luxurious self-indulgence

new and unusual or experimental ideas

 people filled with excessive and single-minded zeal

having lost the physical, mental, or moral qualities considered normal

lack of seriousness

a view of or attitude toward a situation or event

workers or working-class people

a government

hostile and aggressive.

having, showing, or involving a system, method, or plan

used as an intensifier

an institution offering shelter and support to people who are mentally ill.