The Anglo-Saxon root mark as used in the English word demarcation is best defined by?

The Anglo-Saxon root "mark" as used in the English word "demarcation" is best defined as "to set a boundary or limit".

Here's why:

* Demarcation means the act of setting boundaries or limits. The root "mark" here signifies the act of physically establishing a border or division.

* Other words with the root "mark" that demonstrate this meaning include:

* Landmark: A prominent feature that helps establish a boundary or location.

* Remarkable: Something noteworthy or distinct, setting it apart from the ordinary.

* Trademark: A distinctive feature that identifies a product or brand.

Therefore, the Anglo-Saxon root "mark" in "demarcation" carries the core meaning of defining a limit or boundary.