IPA: //ˌeɪ.miˈæb.ɪ.lɪ.ti//
KK: /ˌeɪ.miˈæb.ɪ.lɪ.ti/
A quality of being friendly and pleasant, making it easy for others to feel comfortable and happy around you.
Her amiability made her popular among her peers.
Amiability is formed from "amiable" (from Old French *amiable*, meaning friendly or lovable) and the suffix "-ity" (meaning the state or quality of). The word "amiability" refers to the quality of being friendly and pleasant.
Think of 'amiable' meaning friendly, and remember that 'amiability' is the quality of being friendly.