preoccupy

This term describes a state of mental absorption where a single thought or worry crowds out all other cognitive activity. It carries a heavier, more obsessive weight than simply being interested in something, often implying a sense of anxiety or an inability to focus on the present moment due to an internal fixation.

In its rarer spatial sense, the word functions as a strategic term for seizing a location first. This usage emphasizes the competitive advantage of arrival and the act of establishing presence before an opponent can do so, shifting the meaning from a psychological state to a physical action of territorial acquisition.