IPA: //ˌʌnəˈfɛktɪdnəs//
KK: /ʌnəˈfɛktɪdnəs/
The condition of not being influenced or changed by something; remaining calm and composed regardless of external factors.
Her unaffectedness in stressful situations impressed everyone around her.
**Unaffectedness** → It is formed from "un-" (meaning not) and "affected" (from Latin *affectare*, meaning to influence or have an effect on) and the suffix "-ness" (meaning the state or quality of). The word "unaffectedness" means the state of not being influenced or having an effect on one.
Think of 'not' ('un-') being combined with 'influenced' ('affected') to remember that 'unaffectedness' refers to the quality of not being influenced.