IPA: /ˈwɜːrɪsəmnəs/
KK: /ˈwɜːrɪsəmnəs/
The quality or state of causing concern or anxiety.
The worrisomeness of the situation made everyone feel uneasy.
Worrisomeness → It is formed from "worrisome" (from the verb "worry" which comes from Old English "wyrgan", meaning to strangle or choke) and the suffix "-ness" (meaning the state or quality of). The word "worrisomeness" refers to the state of being full of worry or anxiety.
Think of the state of being 'full of worry' — 'worrisome' describes that feeling, and '-ness' indicates a quality or state.