impeccably
Definitions
In a way that is faultless, flawless, or perfect.
In a manner that adheres strictly to the highest standards of propriety or correctness.
Examples
She was dressed impeccably for the gala, leaving everyone in awe of her style.
The hotel room was cleaned impeccably, with not a single speck of dust to be found.
Synonyms
flawlessly perfectly faultlessly spotlessly immaculately infallibly irreproachably
Antonyms
flawed imperfectly faultily sloppily incorrectly messily inaccurately