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over-optimistic
01
(of a person) being unreasonably confident or hopeful that something will succeed or happen
Example
She was over-optimistic about finishing the assignment in one day.
He tends to be over-optimistic, believing everything will work out perfectly without considering possible setbacks.
They were over-optimistic about their chances of winning without proper preparation.
02
showing unreasonable confidence or hopefulness for the occurrence or success of something, even though the opposite is proved to be the case by later events
