IPA: /ˈwɛlkəmnəs/
KK: /ˈwɛlkəmnəs/
The state or quality of being accepted or greeted with pleasure.
The warm atmosphere of the party created a sense of welcomeness for all the guests.
Welcomeness is formed from "welcome" (from Old English *wilcuma*, meaning a person who is wished well) and the suffix "-ness" (meaning the state or quality of). The word "welcomeness" refers to the quality of being welcome or the state of being received with pleasure.
Think of someone who is a 'person wished well' ('wilcuma') and how that relates to the 'state' ('-ness') of being received positively. This helps you remember that 'welcomeness' means the quality of being welcome.