quarantine

時事的な用語

1. 隔離
2. 罹患

特徴的な語のため、語源を調べると、40を表すラテン語が起源。16世紀での英語の用法は、夫の死後、寡婦の40日間の滞在期限や、イエスの荒野での40日間の修行を意味するもの。

Earlier in English the word meant "period of 40 days in which a widow has the right to remain in her dead husband's house" (1520s), and, as quarentyne (15c.), "desert in which Christ fasted for 40 days," from Latin quadraginta "forty."
Online Etymology