The words with negative connotations in the passage are "inhuman," "cruelty," and "rebelled."
These words suggest that the treatment of the slaves was unfair and unjust, which supports the claim that slavery was an oppressive and cruel institution.
The word "inhuman" implies that the treatment of slaves was so bad that it was not even considered to be of the same level as humans, while "cruelty" and "rebelled" suggest that the slaves were mistreated to the point that they had no choice but to fight back. This paints a clear picture of the inhumane conditions that slaves were subjected to and supports the claim that slavery was an oppressive and cruel institution.
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