RIGID

adjective Etymology: Middle English ~e, from Latin ~us, from rigēre to be stiff Date: 15th century 1. deficient in or devoid of flexibility , appearing stiff and unyielding , 2. inflexibly set in opinion, strictly observed , firmly inflexible rather than lax or indulgent , precise and accurate in procedure , having the outer shape maintained by a fixed framework, ~ly adverb ~ness noun Synonyms: see: ~ see: stiff