Refractory people deliberately don't obey someone in authority and so are difficult to deal with or control.
If someone is fractious, they are easily upset or annoyed over unimportant things.
A fracture is a break or crack, such as of or in a bone.
perform a division
constituting or comprising a part or fraction of a possible whole or entirety
the trait of being prone to disobedience and lack of discipline
a crime less serious than a felony
subject to refraction
the change in direction of a propagating wave (light or sound) when passing from one medium to another
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