Pessimistic vs. Sadistic

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Difference Between Pessimistic and Sadistic
Pessimisticadjective
Marked by pessimism and little hopefulness; expecting the worst.
a pessimistic view of the futureSadisticadjective
Delighting in or feeling pleasure from the pain or humiliation of others.
Pessimisticadjective
Pertaining to the worst-case scenario.
a pessimistic estimateSadisticadjective
Of behaviour which gives pleasure in the pain or humiliation of others.
Pessimisticadjective
(computing) Taking out exclusive locks on data to prevent conflicts with other processes that might modify it.
pessimistic concurrency; pessimistic lockingSadisticadjective
(colloquial) Causing a high degree of pain or humiliation.
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Pessimisticadjective
expecting the worst in this worst of all possible worlds
Sadisticadjective
deriving pleasure or sexual gratification from inflicting pain on another