e.g. In order to build the structure, we must build a rigid support on the bottom.
e.g. He has a rigid mindset of negativity and being overly critical of himself.
e.g. In boarding school, the student have to adhere to a rigid schedule.
e.g. She has really rigid parents who don't even let her go out on the weekends.
e.g. He makes sure that there is rigid control of each process in the factory for high quality products.
e.g. The rigid outer structure of the aircraft.
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