Etymology

sincerely

sin·cere·ly
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Today it means: In a sincere or earnest manner; honestly. Full definition →

Latin sincērus
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The story

  1. Latin · derived fromsincērus“pure, clean, sound”
  2. English todaysincerely

From sincere + -ly, from Latin sincērus (“pure, clean, sound”).

Words from the same roots

Latinsincērus all →

sincere

Etymology from Wiktionary, CC BY-SA 4.0.