loose something on/upon somebody/something phrasal verb ( see also ↑ loose )
literary to allow something dangerous or harmful to begin to affect a situation or other people:
the evils loosed upon humanity in World War II
loose something on/upon somebody/something phrasal verb ( see also ↑ loose )
literary to allow something dangerous or harmful to begin to affect a situation or other people:
the evils loosed upon humanity in World War II
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012