pessimistic

/ˌpɛ.səˈmɪs.tɪk/

adjective

Marked by pessimism and little hopefulness; expecting the worst.
"a pessimistic view of the future"
Pertaining to the worst-case scenario.
"a pessimistic estimate"
Taking out exclusive locks on data to prevent conflicts with other processes that might modify it.
"pessimistic concurrency; pessimistic locking"

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