9 letters · 14 points in Scrabble
noun an earnest and sincere feeling
noun the quality of being open and truthful; not deceitful or hypocritical
noun a quality of naturalness and simplicity
originFrom Middle English sinceritie, from Old French sincerité and Medieval Latin sincēritās; both from Latin sincēritās, from sincērus + -tās. Equivalent to sincere + -ity.
Etymology from Wiktionary, CC BY-SA 3.0