Without fault or error; perfect and beyond criticism. It describes something that is flawless in execution, behavior, or quality.
From Latin 'impeccabilis,' meaning 'not liable to sin,' composed of 'in-' (not) and 'peccare' (to sin or err). Originally a theological term describing sinlessness, it broadened to mean general perfection, entering English in the 16th century.
Break it down: 'im-peccable' means 'not able to peck' (find fault with) - it's so perfect you can't peck at it! This praise word often describes manners, taste, or performance.
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