cluster 词性：
名词、动词
释义：群、簇、丛、串；群聚、丛生；使聚集、聚集在某人的周围
例句：There is a cluster of stars in the night sky.
closet 词性：
名词
释义：壁橱、密室
例句：She opened the closet to find her old dress.
closure 词性：
名词
释义：关闭、停止、结束
例句：The meeting was adjourned until further notice, which was a bit of a closure for everyone involved.
conclude 词性：
动词
释义：断定、推断出、得出结论；使结束、终止；达成、订立、缔结（协定）
例句：The research concluded that the new method is more efficient than the old one.
exclude 词性：
动词
释义：排除、不包括
例句：We need to exclude all irrelevant information from our discussion.
exclusive 词性：
形容词
释义：排他的、专有的
例句：This club is exclusive to members only.
include 词性：
动词
释义：包括、包含
例句：The price includes shipping and handling fees.
seclude 词性：
动词
释义：隔离、使孤立
例句：The patient was secluded in a quiet room to rest.
这些单词都以clus或其变体clos、clud为词根，主要与“关闭”、“包含”、“聚集”等概念相关。希望这些信息对你有所帮助。
