fault A2

/fɔlt/ Responsibility for something bad that has happened.

faultless C2+

/ˈfɔltləs/ without flaw or error; perfect

faultfind C2+

/ˈfɔltˌfaɪnd/ to seek out and complain about minor faults

faultful C2+

/ˈfɔltfəl/ full of faults; blameworthy or defective