strict

Rigorous in the imposition of discipline.

Conforming completely to established rule, principle, or condition.

Requiring close observance or demanding in expectations: synonym: severe.

Carefully maintained or observed.

Not loose or vague; exact or precise.

Stiff, narrow, and upright.

Drawn tight; tight; close: as, a strict ligature.

Tense; stiff: as, a strict or lax fiber.