rigid
adjective
stiff or unyielding; not pliant or flexible; hard.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Frequently there is an overrigidity, a ceaseless self-examination that now and then produces miracles of character and achievement but more often brings the breakdown of health.
From The Foundations of Personality by Abraham Myerson