Imagine a mighty warrior secluding herself in her living quarters from others in her village before she goes out seeking quests. Thus, remember the word “Sequester” as a combination of Seclusion Quarters + Seek Quest. Remember thus.
Memorize and Learn the Usage of the Word: QUARANTINE
The word “Quarantine” should remind you of “Quarter”, which is used to refer to rooms or lodgings, especially those allocated to people in military or domestic service. Imagine a large number of people who have been kept separate in quarters, which would mean that the people are in a quarantine. Remember thus.