drop (n.)youdaoicibaDictYouDict[drop 词源字典]
Old English dropa "a drop of liquid," from Proto-Germanic *drupon (cognates: Old Saxon dropo, Old Norse dropi, Dutch drop, Old High German tropfo, German Tropfen (n.)), from PIE *dhreu-. Meaning "an act of dropping" is from 1630s; of immaterial things (prices, temperatures, etc.) from mid-19c. Meaning "lozenge, hard candy" is 1723. Meaning "secret place where things can be left illicitly and picked up later" is from 1931. Drop in the bucket (late 14c.) is from Isa. ix:15 [KJV]. At the drop of a hat "suddenly" is from 1854; drop-in "casual visit" is 1819; drop-kick is 1857. To get the drop on someone originally was Old West gunslinger slang (1869).[drop etymology, drop origin, 英语词源]
tulip (n.)youdaoicibaDictYouDict
1570s, via Dutch or German tulpe, French tulipe "a tulip" (16c.), all ultimately from Turkish tülbent "turban," also "gauze, muslin," from Persian dulband "turban;" so called from the fancied resemblance of the flower to a turban.

Introduced from Turkey to Europe, where the earliest known instance of a tulip flowering in cultivation is 1559 in the garden of Johann Heinrich Herwart in Augsburg; popularized in Holland after 1587 by Clusius. The tulip-mania raged in Holland in the 1630s. The full form of the Turkish word is represented in Italian tulipano, Spanish tulipan, but the -an tended to drop in Germanic languages, where it was mistaken for a suffix. Tulip tree (1705), a North American magnolia, so called from its tulip-shaped flowers.