PANDORA'S BOX


Meaning of PANDORA'S BOX in English

■ noun a process that once begun generates many complicated problems.

Origin

from Pandora in Greek mythology, who was sent to earth with a jar or box of evils and contrary to instructions opened it, letting out all the evils to infect the earth; hope alone remained.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.