Chapter Simple-hearted to Sincerity of S by Webster's Dictionary (1913 Edition)

Syn. — Honest; unfeigned; unvarnished; real; true; unaffected; inartificial; frank; upright. See Hearty.

Sincerely
(Sin*cere"ly), adv. In a sincere manner. Specifically: (a) Purely; without alloy. Milton. (b) Honestly; unfeignedly; without dissimulation; as, to speak one's mind sincerely; to love virtue sincerely.

Sincereness
(Sin*cere"ness), n. Same as Sincerity. Beau. & Fl.

Sincerity
(Sin*cer"i*ty) n. [L. sinceritas: cf. F. sincérité.] The quality or state of being sincere; honesty of mind or intention; freedom from simulation, hypocrisy, disguise, or false pretense; sincereness.

I protest, in the sincerity of love.

Shak.

Sincerity is a duty no less plain than important.

Knox.