IPA: /ˌrɛn.təˈbɪl.ɪ.ti/
KK: /ˈrɛntəˌbɪlɪti/
The ability of a property or investment to generate profit or income after covering its costs.
The rentability of the apartment made it a great investment for the owner.
Rentability → It is formed from "rent" (from Old French *rente*, meaning income or profit) and "-ability" (meaning the quality of being). The word "rentability" refers to the quality of being able to generate income or profit.
Think of 'rent' as income and '-ability' as the quality of having that income — that's why rentability means the ability to generate profit.