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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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PBA Commissioner Willie Marcial said last month that Abueva's reinstatement will depend on his sincereness to change his ways.
He just replied 'I hope you are both well in all sincereness. I will be in touch soon about DNA'."