harmonyyoudaoicibaDictYouDict[harmony 词源字典]
harmony: [14] The etymological idea behind harmony is ‘fitting things together’ – that is, of combining notes in an aesthetically pleasing manner. It comes via Old French harmonie and Latin harmonia from Greek harmoníā ‘means of joining’, hence ‘agreement, concord’, a derivative of harmós ‘joint’. As a musical term in Greek it appears to have denoted ‘scale’, or more simply just ‘music’, and its original use in English was for what we would now call ‘melody’.

It was not applied to the combination of notes to form chords (a practice which originated in the 9th century) until the 16th century. The term harmonica was coined in 1762 by the American physicist and statesman Benjamin Franklin for a musical instrument consisting of a set of water-filled glasses tuned to different notes and played with the fingers. It was first applied to the mouth-organ in the 19th century.
[harmony etymology, harmony origin, 英语词源]
aesthetic (n.)youdaoicibaDictYouDict
1798, from German Ästhetisch or French esthétique, both from Greek aisthetikos "sensitive, perceptive," from aisthanesthai "to perceive (by the senses or by the mind), to feel," from PIE *awis-dh-yo-, from root *au- "to perceive" (see audience).

Popularized in English by translation of Immanuel Kant, and used originally in the classically correct sense "the science which treats of the conditions of sensuous perception." Kant had tried to correct the term after Alexander Baumgarten had taken it in German to mean "criticism of taste" (1750s), but Baumgarten's sense attained popularity in English c. 1830s (despite scholarly resistance) and removed the word from any philosophical base. Walter Pater used it (1868) to describe the late 19c. movement that advocated "art for art's sake," which further blurred the sense. As an adjective by 1803. Related: Aesthetically.
bourgeois (adj.)youdaoicibaDictYouDict
1560s, "of the French middle class," from French bourgeois, from Old French burgeis, borjois "town dweller" (see bourgeoisie). Sense of "socially or aesthetically conventional" is from 1764; in communist and socialist writing, as a noun, "a capitalist" (1883).
It is better to be a good ordinary bourgeois than a bad ordinary bohemian. [Aldous Huxley, 1930]