What is the root of word cloister?

The root of the word "cloister" comes from the Latin word "claustrum," which means "enclosure" or "a closed place."

This is fitting, as cloisters are typically enclosed spaces within a monastery or convent, often containing a courtyard and surrounded by covered walkways. The word "cloister" has evolved over time to encompass not only the physical structure but also the sense of seclusion and religious devotion associated with such spaces.