IPA: /ˌpɛsɪˈmɪstɪkli/
KK: /pɛsɪˈmɪstɪkli/
In a way that shows a lack of hope or confidence about the future.
She looked at the situation pessimistically, believing that things would only get worse.
Pessimistically → It is formed from "pessimus" (meaning worst) and the suffix "-ic" (meaning pertaining to) combined with "-ally" (meaning in a manner). The word "pessimistically" means in a manner that relates to the worst possible outcome or view.
Think of 'worst' ('pessimus') to remember that 'pessimistically' means viewing things in the worst possible way.