trench warfare

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a struggle (usually prolonged) between competing entities in which neither side is able to win
- the hope that his superior campaigning skills would make a difference evaporated in the realization that electioneering had become a form of trench warfare
• Hypernyms:
war, warfare
2. a type of armed combat in which the opposing troops fight from trenches that face each other
- instead of the war ending quickly, it became bogged down in trench warfare
• Hypernyms:
combat, armed combat