IPA: /səˈpɔːrtɪvnəs/
KK: /səˈpɔrtɪvnəs/
The quality of being helpful and encouraging to others.
Her supportiveness made it easier for everyone to share their ideas.
Supportiveness → It is formed from "support" (from Old French *supporter*, meaning to carry or bear) and the suffix "-ness" (meaning the state or quality of). The word "supportiveness" refers to the quality of providing support or assistance.
Think of the word 'support' which means to carry or help, and remember that 'supportiveness' is the quality of being helpful or providing support.