pipe dream

Etymology
From the fantasies experienced when smoking an opium pipe, equivalent to 🇰🇲. First attested in the 1800s; compare 🇨🇬, which is an identical yet separate and unconnected formation.

Noun

 * 1)  A plan, desire, or idea that will not likely work; a near impossibility.

Translations

 * Afrikaans: lugkasteel, wensdroom
 * Armenian: անիրականալի երազանք,
 * Bashkir: хыял
 * Bulgarian: празна надежда, въздушна мечта
 * Catalan:
 * Chinese:
 * Mandarin:
 * Czech: vzdušné zámky
 * Danish: ønskedrøm, luftkastel
 * Dutch: ,
 * Esperanto: aerkastelo, ĥimero
 * Finnish:
 * French: rêve chimérique,
 * German:,  ,
 * Greek: ὀνειροπόληση,
 * Hebrew: ,
 * Hungarian:, ,
 * Japanese: 夢物語
 * Maori: waitara
 * Norwegian:, ønskedrøm
 * Polish:, ,
 * Portuguese:
 * Russian: несбы́точная мечта́, возду́шные за́мки
 * Spanish:, , castillo en el aire,
 * Swedish: ,
 * Turkish: ,
 * Welsh: