harmony (n.)
late 14c., “combination of tones pleasing to the ear,” from Old French harmonie, armonie “harmony,” from Greek harmonia “agreement, concord of sounds,” also as a proper name, the personification of music, literally “means of joining,” used of ship-planks, etc., also “settled government, order,” related to harmos “fastenings of a door; joint, shoulder,”
proportion (n.)
late 14c., proporcioun, “due relation of one part to another,” also “size, extent; comparative relation of one thing to another in size, degree, number, etc.,” Also from late 14c. as “relation of body parts,” hence “form, shape.”
beauty (n.)
early 14c., bealte, “physical attractiveness,” also “goodness, courtesy,” from Anglo-French beute, Old French biauté “beauty, seductiveness, beautiful person”, from Vulgar Latin *bellitatem (nominative bellitas) “state of being pleasing to the senses” (source also of Spanish beldad, Italian belta), from Latin bellus “pretty, handsome, charming,” in classical Latin used especially of women and children, or ironically or insultingly of men, perhaps from PIE *dw-en-elo-, diminutive of root *deu- (2) “to do, perform; show favor, revere.” Famously defined by Stendhal as la promesse de bonheur “the promise of happiness.
pupil size increase / mimicry / excitement / energy / relaxes