rigid

(rĭjˈĭd)

1. Not flexible or pliant; stiff.
2. Not moving; fixed.
3. Marked by a lack of flexibility; rigorous and exacting: “We have watered down a rigid training . . . until we now have an educational diet in many of our public high schools that nourishes neither the classes nor the masses” (Agnes Meyer).
4. Scrupulously maintained or performed: rigid discipline. See Synonyms at stiff.

Related Forms:

• rigˈid·ly adverb

• rigˈid·ness noun