Trench warfare meaning in hindi

How to pronounce Trench warfare
As noun : अर्थहीन संघर्ष Ex:  Periods of trench warfare occurred during the American Civil War
खाई युद्ध Ex:  The machine gun is perhaps the signature weapon of trench warfare
Examples
Usage of Trench warfare in sentences

The word can be used as noun in hindi and have more than one meaning. 
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