sincere
UK: sɪnˈsɪə | US: sɪnˈsɪr
adj. free from deceit, hypocrisy, or falseness; genuine
adj. (of an action or emotion) expressed honestly and without pretence
The word "sincere" originates from the Latin phrase sine cera ("without wax"), referring to unadulterated or pure substances. In ancient Rome, dishonest sculptors or potters would hide flaws in their work with wax. A "sincere" (unwaxed) piece was thus genuine and untainted. Over time, the term evolved metaphorically to describe honesty and authenticity in character or expression.
She gave a sincere apology for her mistake.
His sincere efforts to help were appreciated by everyone.
The artist’s work reflects a sincere passion for nature.
I could tell his compliment was sincere.
A sincere smile can brighten someone’s day.