英语 example sentences with "obdurate"

I tried everything I could think of to convince them to stop ruining their life, but they remained obdurate to the very end.
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They called her obdurate, and indeed she was the most stubborn member of the opposition.
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The researchers named the prehistoric animal Obdurodon, Greek for “lasting (obdurate) tooth,” because its teeth are unlike today’s platypus species.
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