rig

Usage

• rigorous

  A rigorous teacher expects a lot from their students; therefore, they can be strict with rules and demand that their students learn a lot of information.

• rigid

  A rigid person, such as a teacher or parent, has very strict rules that others must follow; they are unlikely to change or bend those rules.

• rigidify

  become rigid

• rigidity

  the physical property of being stiff and resisting bending

• rigor

  something hard to endure