impeccable
im·pec·cable
adjective
1.
- “faultless logic”
- “speaks impeccable French”
- “timing and technique were immaculate”
- “an immaculate record”
Origin
From Middle French impeccable, from Latin impeccabilis (“not liable to sin”), from im- (“not”) + peccare (“to err, to sin”).
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.