Synonyms 1. narrow, illiberal, harsh, austere. Strict,rigid,rigorous,stringent imply inflexibility, severity, and an exacting quality. Strict implies great exactness, especially in the observance or enforcement of rules: strict discipline. Rigid, literally stiff or unbending, applies to that which is (often unnecessarily or narrowly) inflexible: rigid economy. Rigorous, with the same literal meaning, applies to that which is severe, exacting, and uncompromising, especially in action or application: rigorous self-denial. Stringent applies to that which is vigorously exacting and severe: stringent measures to suppress disorder. 4. accurate, scrupulous.
1592, "narrow, drawn in, small," from L. strictus "drawn together, tight, rigid," pp. of stringere "draw or bind tight" (see strain (v.)). The sense of "stringent and rigorous" (of law) is first found in 1578; of qualities or conditions generally, 1588.