2. Based on what is truly and deeply felt: Oliver showed his sincerest concern about his health by working out at the fitness studio as often as possible and striving to eat properly.
3. Free of deceit, hypocrisy, pretense, or falseness; earnest: Henry wrote a sincere apology for his critical statements during the business meeting.
Jason expressed his sincerest hope for Jill's recovery from her illness.
4. Etymology: Early senses (mid 16th century) of sincere included "not falsified" and "unadulterated"; the source is Latin sincerus, "clean, pure" and the notion "containing no deception" was also expressed early.Theories of the etymology of sincere
Several ideas have been advanced to explain the derivation of the word sincere, but none has been substantiated!
The most logical attributes the genesis of the word to the Latin sincerus, meaning "pure" or "clean"; but, many etymologists state that sincere is a compounding of sine cera, which means "without wax".
According to this "unverifiable etymology", in the time of the ancient Romans, devious dealers in marble and pottery would conceal defects in their products by filling the cracks and holes with wax and matching marble dust.
Honest merchants, who did not doctor their products, proudly displayed their wares as being "without wax"; that is, they were sine cera.
It is unlikely that this is the origin of sincere; at any rate, accepting this theory should alert us to not forget another Latin phrase: caveat emptor!
Other "assumed origins" of sincere
This sneaky trick (rubbing wax into the cracks of marble works) came to the attention of the Roman Senate, which passed a law stating that all marble purchased by the government must be sine cera, "without wax".
From this law and this root, comes our modern word sincere, which means "without deceit".
Sincere comes from an early period when middle-class Roman citizens wanted duplicates of fine art for their own smaller villas and gardens.
There was, at the time, a kind of "assembly line" of cheap sculptures produced from poorer grades of marble; and often in the manufacturing process, a nose, an ear, or a finger, would break off, which the sculptor would repair with paraffin wax mixed with marble dust.
For those who wanted to be sure that that they had the best quality, the artist would inscribe sine ceres on the bottom of the statue to certify that such a piece of work was fully genuine and "with no wax".
One more theory of the origin of sincere
Modern scholars do not accept the dubious account about sincere originally meaning "without wax".
The present belief is that the Latin sincerus, which became sincere in English, came from sine, "without", and some lost word that was akin to caries, "decay".
It would thus be synonymous with the Greek akeratos, "without taint".