Noun

(uncountable) The state or quality of being strict.

:Discipline calls for a certain strictness .

{{quote-Fanny Hill, part=3 , I lost all restraint, and yielding to the force of the emotion, gave down, as mere woman, those effusions of pleasure, which, in the strictness of still faithful love, I could have wished to have held up.}}

(countable) The result or product of being strict.