gray (adj.)youdaoicibaDictYouDict
"of a color between white and black; having little or no color or luminosity," Old English græg "gray" (Mercian grei), from Proto-Germanic *grewa- "gray" (cognates: Old Norse grar, Old Frisian gre, Middle Dutch gra, Dutch graw, Old High German grao, German grau), with no certain connections outside Germanic. French gris, Spanish gris, Italian grigio, Medieval Latin griseus are Germanic loan-words. The spelling distinction between British grey and U.S. gray developed 20c. Expression the gray mare is the better horse in reference to households ruled by wives is recorded from 1540s.
greyhound (n.)youdaoicibaDictYouDict
Old English grighund (West Saxon), greghund (Anglian) "greyhound," probably from grig- "bitch," a word of unknown etymology, + hund "dog" (see hound (n.)). The first element in the name apparently has nothing to do with color, as most of the hounds are not gray, but the exact sense of it must have been early forgotten, as it has been long associated with the color in popular imagination. In some Middle English forms it appears to be conformed to Grew, an old word for "Greek" (from Old French Griu). The Old Norse form of the word is preserved in Hjalti's couplet that almost sparked war between pagans and Christians in early Iceland:
Vilkat goð geyja
grey þykkjumk Freyja

I will not blaspheme the gods,
but I think Freyja is a bitch
hungryyoudaoicibaDictYouDict
Old English hungrig "hungry, famished;" see hunger + -y (2). Compare Old Frisian hungerig, Dutch hongerig, German hungrig. Figurative use from c. 1200. Related: Hungrily.
PotemkinyoudaoicibaDictYouDict
in reference to Grigory Aleksandrovich Potemkin (1739-1791), favorite of Catherine II of Russia, especially in reference to the sham villages supposedly erected under his orders for the empress’ tour of Crimea (1787) to create an impression of prosperity and progress. The silent film "Battleship Potemkin" dates from 1925, depicting (with elaboration) events of 1905 and the mutiny of a Russian battleship named for the Tsarist minister.
RasputinyoudaoicibaDictYouDict
acquired name (Russian, literally "debauchee") of Grigory Yefimovich Novykh (c. 1872-1916), mystic and faith healer who held sway over court of Nicholas II of Russia. His nickname is from his doctrine of "rebirth through sin," that true holy communion must be preceded by immersion in sin. His name used figuratively in English from 1937 for anyone felt to have an insidious and corrupting influence.
Stakhanovite (n.)youdaoicibaDictYouDict
1935, from name of hard-working Soviet coal miner Aleksei Grigorevich Stakhanov (1906-1977), in reference to an efficiency system in which workers increase their piecework production and are rewarded with bonuses and privileges. Soviet authorities publicized his prodigious output as part of a campaign to increase productivity.