quarantine

1. To place into isolation to prevent the spread of any contagious disease. (transitive) · Venice began quarantining incoming ships for 40 days in 1448 to prevent further outbreaks of bubonic plague.
2. To enter or stay in quarantine, particularly to self-quarantine to avoid an epidemic disease. (intransitive) · International travelers must quarantine themselves at their own expense in a designated hotel for 14 days upon arrival.
3. Synonym of isolate more generally. (figuratively, transitive) · J.F.K. "quarantined" Cuba rather than blockading it to avoid needless escalation of the conflict.
4. Synonym of restrict. (figuratively, transitive)

He/she/it quarantines · Past quarantined · Past participle quarantined · -ing form quarantining