Answer :
Final answer:
Grimy means dirty or filthy, illustrating the unsanitary conditions of the trenches during the war.
Explanation:
Grimy means dirty, filthy, or contaminated. In the context of the question, the trenches were grimy because they were old and filled with mud, filth, and unsanitary conditions during the war.
Learn more about Meaning of Grimy in Trench Warfare here:
https://brainly.com/question/22951135
