The word "contumacious" is from Latin. It is from c.1600s, from
the stem of "contumax," meaning "haughty, insolent, obstinate."
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Contumacious (adj)
rebellious, disobedient, insubordinate
Her contumacious attitude gave her detention for a week.
The child's contumacious attitude towards house chores, bought him a grounding for a week.
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The analogy of continuation hesitation is like a stutter in speech - it disrupts the flow and can make communication less smooth.
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Contumely is a noun, as odd as that seems. It has the look and
sound of an adverb, but it is not. It means rude language or
treatment arising from haughtiness or contempt. Contumeliate would
be a verb form of the word. The adjective would be contumelious.
Related words are contumacious and contumacy.