drop (n.)
Middle English drope, from Old English dropa "a small, spherical mass of liquid," from Proto-Germanic drupon (source also of Old Saxon dropo, Old Norse dropi, Dutch drop, Old High German tropfo, German Tropfen (n.)). Sense of "minute quantity of anything, least possible amount" is from c. 1200. Meaning "an act of dropping" is from 1630s; of immaterial things (prices, temperatures, etc.) from mid-19c.
ornament (n.)
c. 1200, ournement, "an accessory; something that serves primarily for use but also may serve as adornment; ornamental apparel, jewels," from Old French ornement "ornament, decoration," and directly from Latin ornamentum "apparatus, equipment, trappings; embellishment, decoration, trinket," from ornare "to equip, adorn," from stem of ordo "row, rank, series, arrangement". The sense shift in English to "something employed simply to adorn or decorate, something added as an embellishment, whatever lends grace or beauty to that to which it is added or belongs" is by late 14c. (this also was a secondary sense in classical Latin). Meaning "outward appearance, mere display" is from 1590s. The figurative use is from 1550s; the meaning "one who adds luster to one's sphere or surroundings" is from 1570s.