- adj. 不犯错误的；一贯准确的；万无一失的
not liable to error;
"the Church was...theoretically inerrant and omnicompetent"
"lack an inerrant literary sense"
"an unerring marksman"
- The antique dealer has an unerring ability to spot a fake.
- You can trust his unerring taste in cloths.
- He had an unerring instinct for when people were lying to him.
- He have an unerring knack of saying the wrong thing.