Encirclement (noun)

1. The action of surrounding or encircling.
2. The state of being surrounded.

Origin:

Mid 19th century: from french encerclement, from en- (expressing encirclement) + cercle 'circle'.

Examples:

1. The encirclement of the city by the enemy forces cut off all means of communication and supplies.
2. The encirclement of the protesters by the police created a tense and volatile situation.
3. The encirclement of the island by a coral reef provided a safe and sheltered environment for marine life.
4. The encirclement of the fortress by the army prevented any escape or reinforcement.
5. The encirclement of the hilltop by the forest provided a beautiful and peaceful view.