faultless
adjectiveUK /ˈfɔːltləs/
US /ˈfɔːltləs/
Having no mistakes or problems at all.
Her homework was faultless, so the teacher gave her a gold star.
OTHER MEANINGS
2. Without any bad behavior or blame.
The kind old man lived a faultless life and helped everyone.
3. So good that no one can find anything wrong with it.
The cake looked faultless, with smooth icing and perfect swirls.
4. Working exactly as it should, with nothing broken.
The robot's faultless timing made it catch every ball.