strict 
(strĭkt)
(strĭkt)adj. strict·er, strict·est
1.
a. Rigorous in the imposition of discipline: a strict parent.
b. Conforming completely to established rule, principle, or condition: a strict vegetarian.
2.
a. Requiring close observance or demanding in expectations: strict standards. See Synonyms at severe.
b. Carefully maintained or observed: strict silence; strict loyalty.
3. Not loose or vague; exact or precise: a strict definition.
4. Botany Stiff, narrow, and upright.
[Middle English stricte, narrow, small, from Latin strictus, tight, strict, past participle of stringere, to draw tight; see streig- in the Appendix of Indo-European roots.]
strictly adv.
strictness n.