回天

Verb

 * 1)  to save a desperate situation

Etymology
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Noun

 * 1)  changing the worsening situation for the better; turning the tide

Verb

 * 1)  to change the worsening situation for the better; to turn the tide

Proper noun

 * 1)  Kaiten, crewed torpedoes and suicide craft used by the Imperial Japanese Navy in the final stages of World War II