Word origins

• wet workA covert assassination performed by government operatives.
• when shrimps whistleWhen pigs fly; never.
• white amurA freshwater fish species of the family Cyprinidae (Ctenopharyngodon idella), the grass carp, native to Asia from Vietnam to the Amur River.
• White Armya collation of anti-Bolshevik armed groups that fought the Red Army during the Russian Civil War
• White RussiaA historical East Slavic region.
• White SeaA sea to the northwest of Russia.
• wolf's ticketIn tsarist and Stalinist-era Russia, a restricted internal passport issued to those suspected or convicted of political or other crimes which limited where they could travel and reside.
• zone of proximal developmentThe space between what a learner is capable of doing unsupported and what the learner cannot do even with support.