IPA: /sɪˈkjʊərnəs/
KK: /sɪˈkjʊərnəs/
The quality or state of being safe and protected from harm or danger.
The secureness of the building was ensured by strong locks and security cameras.
Secureness → It is formed from "secure" (from Latin "securus", meaning free from care or safe) and the suffix "-ness" (meaning the state or quality of). The word "secureness" refers to the state of being secure or safe.
Think of being 'free from care' ('securus') and how that relates to the 'state' ('-ness') of feeling safe.