This is the 3426th most frequent Japanese word.
溝
"溝" means "ditch," "gutter," or "gap."
In this sentence, 溝 refers metaphorically to a 'gap' or 'division' in cultural understanding or context.
ヨーロッパとアジアの間には文化的な溝がある。
There is a cultural gap between Europe and Asia.
Here, 溝 is used in its literal sense to mean a 'ditch' or 'trench' created in the ground for water flow.
庭に水を流すために溝を掘る。
I dig a ditch in the garden to channel water.
This usage of 溝 metaphorically refers to a significant 'rift' or 'disagreement' between individuals.