This seems too obvious to be the right answer, but...sleep?
Try 'idleness'.
Abeyance
A four letter word meaning not kosher is: tref
What is a nine letter word meaning very tidy
The word pine can have that meaning.
Try 'idleness'.
inertia
A word meaning lasting and not temporary is "permanent."
means tooth past
inns
Abeyance
abeyance
relaxation, prosperity, inactivity, facilitate, conciliate, propitiate, strengthen, invigorate, sedateness, depreciate, simplicity
False is a five letter word meaning fake.
A four letter word meaning not kosher is: tref
Flush is a five letter word meaning wealthy.
The answer you are looking for is earsplitting.It is an adjective which means 'loud enough to cause temporary hearing loss'.An example sentence is "the concert was earsplitting".