ostracise — to exclude, by general consent, from society, friendship, conversation, privileges, etc.: His friends ostracized him after his father's arrest.
sequester — to remove or withdraw into solitude or retirement; seclude.
blockade — A blockade of a place is an action that is taken to prevent goods or people from entering or leaving it.
boycott — If a country, group, or person boycotts a country, organization, or activity, they refuse to be involved with it in any way because they disapprove of it.
conceal — If you conceal something, you cover it or hide it carefully.
confine — To confine something to a particular place or group means to prevent it from spreading beyond that place or group.
cover — If you cover something, you place something else over it in order to protect it, hide it, or close it.
quarantine — a strict isolation imposed to prevent the spread of disease.
retire — a movement in which the dancer brings one foot to the knee of the supporting leg and then returns it to the fifth position.
screen — a movable or fixed device, usually consisting of a covered frame, that provides shelter, serves as a partition, etc.
segregate — to separate or set apart from others or from the main body or group; isolate: to segregate exceptional children; to segregate hardened criminals.
separate — to keep apart or divide, as by an intervening barrier or space: to separate two fields by a fence.
withdraw — to draw back, away, or aside; take back; remove: She withdrew her hand from his. He withdrew his savings from the bank.
shut off — the act or time of shutting or closing.
seclude — to place in or withdraw into solitude; remove from social contact and activity, etc.
