Sincere does not mean “without wax”
who knew that? sincere (adj.) 1530s, “pure, unmixed,” from Middle French sincere (16c.), from Latin sincerus, of things, “whole, clean, pure, uninjured, unmixed,” figuratively “sound, genuine, pure, true, candid, truthful,” of uncertain origin. The ground sense seems to be “that which is not falsified.” Meaning “free from pretense or falsehood” in English is from 1530s….
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