<human>:  What is the meaning of the word ‘sacrament’ in the context of the book, ‘The History of Lake Como’?
<bot>: The word sacrament is a noun in this context. It means a sacred ceremony, rite, or observance. The word is often used in religious contexts, but it can also refer to a solemn religious ritual. The word is derived from the Latin word sacramentum, which is a noun meaning a sacred oath or pledge.