English Reference

Word

impeccable

Phoneticsim·pec·ca·ble

US/ˌɪmˈpɛkəbəɫ/

UK/ɪmpˈɛkəbəl/

Definitions

01perfect and without flaws

C1

adj. perfect in every way, with no mistakes or faults.

adj. of the highest standard; faultless and beyond criticism.

“The waiter provided impeccable service throughout our entire meal.”

“The soloist delivered an impeccable performance, navigating the technical complexities of the concerto without a single audible error.”

Formal

Usage

Usually placed before the noun it describes, such as 'impeccable taste' or 'impeccable timing'.

Synonyms

02incapable of sinning

C2 · Religion

adj. unable to do anything wrong or bad.

adj. incapable of sinning or wrongdoing; often used in theological or philosophical contexts.

“Some ancient philosophers believed that a true hero must be impeccable.”

“The theological debate centered on whether the figure was merely sinless in practice or inherently impeccable by nature.”

Formal · Technical

Teaching tip

This sense is rare in everyday conversation; learners will mostly encounter it in academic or religious texts.

Synonyms

Antonyms

falliblesinful

Real-World Examples

“Gently pulsing strings with piquant woodwind and brass build atmospheric soundscapes over which Swedish soprano Ida Falk Winland spins haunting vocal lines in impeccable English.”
The Guardian · 14 Aug 2026
“For Boeing, a company already reeling from years of safety scandals, it is about the integrity of one of its premium products: the 787 Dreamliner, an aircraft with a hitherto impeccable safety record.”
BBC News · 10 Jun 2026

Etymology

From Middle French impeccable, from Latin impeccabilis (“not liable to sin”), from im- (“not”) + peccare (“to err, to sin”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry

Level
C1 · Advanced
Frequency
Frequent
Updated

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English Reference