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adj. sin·cer·er, sin·cer·est
1. Not feigned or affected; genuine: sincere indignation.
2. Being without hypocrisy or pretense; true: a sincere friend.
3. Archaic Pure; unadulterated.

[Latin sincērus; see ker- in Indo-European roots.]

sin·cere′ly adv.
sin·cere′ness n.
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References in periodicals archive ?
That comes from his forthrightness, his honesty, his sincereness, and a very high sense of values.