The nature of possible underlying disease states including cancer or infections can often be detected by microscopically visualizing cytological changes in cells which are exfoliated and captured by fluid extraction from body cavity, brushings, washings, or fine needle aspirations.
Cloister definition, a covered walk, especially in a religious institution, having an open arcade or colonnade usually opening onto a courtyard. See more.
A clique is a group of people who spend a lot of time together and tend to be unfriendly towards people who are not part of their group. To cloister someone is to remove and isolate her from the rest of the world. If you are complaisant you are willing to please others and do what they want without complaining.