IPA: /ˈnɜːrvɪnəs/
KK: /ˈnɜrvɪnɪs/
The quality of being anxious or nervous, often leading to a state of agitation or unease.
Her nerviness before the big presentation was evident as she fidgeted with her notes.
Nerviness → It is formed from "nerve" (from Latin "nervus", meaning sinew or nerve) and the suffix "-iness" (meaning the quality of). The word "nerviness" refers to the quality of being nervous or anxious.
Think of 'nerve' as the source of anxiety and 'iness' as the quality of that state — so nerviness means the quality of being nervous.