Noun
a type of armed combat in which the opposing troops fight from trenches that face each other
a struggle (usually prolonged) between competing entities in which neither side is able to win
Source: WordNetLove is like trench warfare - you cannot see the enemy, but you know he is there and that it is wiser to keep your head down. Lawrence Durrell
The live-and-let-live system that emerged in the bitter trench warfare of World War I demonstrates that friendship is hardly necessary for cooperation based upon reciprocity to get started. Under suitable circumstances, cooperation can develop even between antagonists. Robert Axelrod
The battle for the mind of Ronald Reagan was like the trench warfare of World War I: never have so many fought so hard for such barren terrain. Peggy Noonan
Gay marriage can't be a partisan issue because as long as there are partisan issues or cultural issues in this country, you'll have trench warfare like on the western front in World War I. You'll have lots of carnage and no progress. Peter Thiel
instead of the war ending quickly, it became bogged down in trench warfare Source: Internet
the hope that his superior campaigning skills would make a difference evaporated in the realization that electioneering had become a form of trench warfare Source: Internet