Synonym: earnestness, serious-mindedness, seriousness, unassumingness. Similar words: sincere, insincere, sincerely, asperity, temerity, severity, celerity, austerity. Meaning: n. 1. an earnest and sincere feeling 2. the quality of being open and truthful; not deceitful or hypocritical 3. a quality of naturalness and simplicity 4. the trait of being serious.
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1. Misfortunes test the sincerity of friends. 
2. Misfortune tests the sincerity of friends.
3. The truest politeness comes from sincerity.
4. Sincerity, a deep genuine, heart-felt sincerity, is a trait of true and noble manhood.
5. He impressed her with his sincerity.
6. The little girl persuaded me of her sincerity.
7. "It's wonderful," he said with apparent sincerity.
8. They raised a query on his sincerity.
8. Sentencedict.com try its best to gather and build good sentences.
9. His sincerity is not in question.
10. His sincerity impressed her.
11. I don't doubt her sincerity, but I think she's got her facts wrong.
12. Tom can't persuade himself of my sincerity.
13. Your sincerity is not in dispute.
14. Facts will prove my sincerity.
15. The sincerity of his beliefs is unquestionable.
16. There was a ring of sincerity in his promise.
17. Bradley projects a natural warmth and sincerity.
18. His obvious sincerity inclined me to trust him.
19. She spoke with total sincerity.
20. He tried hard to satisfy me of his sincerity.
21. I don't doubt the girl's sincerity.
22. I don't wish to reflect upon your sincerity.
23. Her sincerity has never been questioned.
24. Her honesty and sincerity positively shine out.
25. His sincerity inclines me to trust him.
26. She wasn't yet convinced of his sincerity.
27. I was impressed with his deep sincerity.
28. There was no mistaking his sincerity.
29. The character of the pine and cypress is shown in frigid winter ; the sincerity of one's friend is shown in adverse circumstances.
30. You are the patron saint of life, your wisdom and sincerity to hold up the sun life, your selfless sacrifice life, heal the wounded bear bitter hardships, pain.
More similar words: sincere, insincere, sincerely, asperity, temerity, severity, celerity, austerity, superiority, prosperity, posterity, dexterity, inheritance, heritability, inferiority, superiority complex, inferiority complex, economic prosperity, pincer, cancer, merit, groceries, dancer, pincers, since, inherit, acerbity, concert, concern, heritage.