late 14c., marchaundising, "goods, commodities, mercantile business," verbal noun from merchandize (v.). Meaning "trade, commerce" is from mid-15c. That of "promotion of goods for sale, activities meant to stimulate interest in products" is by 1910.
1610s, "unconcerned" (the sense that now would go with uninterested), from dis- "opposite of" + interested. The sense of "impartial" originally was in disinteressed (c. 1600), from Old French desinteresse, and subsequently passed to uninterested. The modern sense of disinterested, "impartial, free from self-interest or personal bias, acting from unselfish motives," is attested by 1650s.
By late 18c. the words had sorted themselves out, and as things now stand, disinterested means "impartial," uninterested means "caring nothing for the matter in question," and disinteressed has fallen by the wayside. Related: Disinterestedly; disinterestedness.
Disinterested and uninterested are sometimes confounded in speech, though rarely in writing. A disinterested person takes part in or concerns himself about the affairs of others without regard to self interest, or to any personal benefit to be gained by his action; an uninterested one takes no interest in or is indifferent to the matter under consideration .... [Century Dictionary]
"small, unbound treatise," late 14c., pamflet, "brief written text; poem, tract, small book," from Anglo-Latin panfletus, which probably is a popular short form of "Pamphilus, seu de Amore" ("Pamphilus, or about Love"), a short 12c. Latin love poem popular and widely copied in the Middle Ages; the name from Greek pamphilos "loved by all," from pan- "all" (pam- before labials; see pan-) + philos "loving, dear" see -phile).
Meaning "brief work dealing with questions of current interest; short treatise or essay, generally controversial, on some subject of temporary public interest" is from late 16c.
late 14c., "careful attention to detail" (a sense now obsolete); also "skilled workmanship;" also "desire to know or learn, inquisitiveness" (in Middle English usually in bad senses: "prying; idle or vain interest in worldly affairs; sophistry; fastidiousness"); from Old French curiosete "curiosity, avidity, choosiness" (Modern French curiosité), from Latin curiositatem (nominative curiositas) "desire of knowledge, inquisitiveness," from curiosus "careful, diligent; inquiring eagerly, meddlesome," akin to cura "care" (see cure (n.)).
Neutral or good sense "desire to see or learn what is strange or unknown" is from early 17c. Meaning "an object of interest, something rare or strange" is from 1640s. Curiosity-shop is from 1818.
late 14c., "gatherer of taxes, etc.," from Anglo-French collectour "collector" (of money or taxes; Old French collector, Modern French collecteur), from Late Latin collector, agent noun from colligere "to gather together" (see collect). Meaning "one who collects objects of interest as a pursuit or amusement" is by 1774. Fem. form collectress is attested from 1825.