IPA: /nɛɡəˈtɪvɪti/
KK: /nɛgətɪvɪti/
The quality or state of being negative, often involving pessimism or criticism.
Her constant negativity made it hard for others to stay positive.
Negativity → It is formed from "negare" (meaning to deny) and the suffix "-ity" (meaning the state or condition of). The word "negativity" refers to the state or condition of being negative or denying positivity.
Think of 'denying' ('negare') something and the state of that denial ('-ity') — that's why negativity means the state of being negative.