impeccable
UK: ɪmˈpɛkəb(ə)l | US: ɪmˈpɛkəbəl
adj. flawless; free from error or fault
adj. incapable of wrongdoing or sin
impeccable = im<not> + pecc<sin> + able<capable of>
- im (Latin in-): Negation prefix meaning "not."
 - pecc (Latin peccare): Root meaning "to sin" or "to err."
 - able (Latin -abilis): Suffix meaning "capable of."
 
Etymology Origin:
Derived from Latin impeccabilis, combining in- (not) + peccare (to sin). Originally used in theological contexts to describe divine beings incapable of sin, it later broadened to describe anything flawless or perfect in secular usage. The morpheme pecc survives in words like "peccadillo" (minor sin) and "peccant" (sinful).
Her performance was impeccable, earning a standing ovation.
The chef’s technique is impeccable, with no room for criticism.
He maintained an impeccable reputation throughout his career.
The diamond’s cut was impeccable, reflecting light perfectly.
Despite the chaos, her composure remained impeccable.