IPA: /ˈfɔːltɪnəs/
KK: /ˈfɔltɪnəs/
The state or quality of having mistakes or defects.
The faultiness of the product led to many customer complaints.
Faultiness → It is formed from "fault" (from Old French *faulte*, meaning a defect or error) and "-iness" (meaning the quality of being). The word "faultiness" refers to the quality of having defects or errors.
Think of a 'fault' as a 'defect' and '-iness' as the quality of having that defect. This helps you remember that 'faultiness' means the quality of being faulty.