IPA: /dɪˈzaɪərəˌbɪlɪti/
KK: /dɪˈzaɪərəbɪlɪti/
The quality or state of being wanted or wished for by many people.
The desirability of the new smartphone has led to long lines at the store.
Desirability is formed from "desire" (from Latin "desiderare", meaning to long for or wish for) and the suffix "-ability" (meaning the quality of being). The word "desirability" refers to the quality of being desirable or worth wanting.
Think of 'desire' as longing for something, and '-ability' as the quality of having that longing — that's why desirability means the quality of being wanted.