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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English synneles, senneles, from Old English synlēas (“without sin; sinless”), equivalent to sin + -less. Compare Dutch zondeloos (“sinless”), German Low German sündelos, sündlos (“sinless”), German sündenlos (“sinless”), Icelandic syndlaus (“sinless”).
impeccant, innocent
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Classic usage
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