IPA: /ʌnˈfrɛndli.nəs/
KK: /ʌnˈfrɛndliˌnɛs/
The quality or state of being unkind or hostile towards others.
Her unfriendliness made it difficult for her to make new friends.
Unfriendliness → It is formed from "un-" (meaning not) and "friend" (from Old English "freond", meaning a person with whom one has a bond of mutual affection) and "-liness" (meaning the state or quality of). The word "unfriendliness" means the state of not being friendly or lacking in kindness.
Think of 'not' ('un-') being added to 'friend' (someone you have affection for) and then adding '-liness' to describe the quality of that state. This helps you remember that unfriendliness refers to the quality of not being friendly.