This is the 5764th most frequent Chinese word.
同窗
"同窗" means "classmate."
The word "同窗" refers to someone who shares the same learning environment with you, often used to denote a classmate or peer from an educational context.
他是我的大学同窗,我们一起学习了四年。
He is my university classmate; we studied together for four years.
Here, "同窗" is used to describe peers from a shared educational background meeting together.
每次同窗聚会,我都感到非常开心。
I always feel very happy during each classmates reunion.
In this sentence, "同窗" portrays the shared experience during education that marked the beginning of a long-lasting friendship.