This is the 3205th most frequent Japanese word.
圭
"圭" is a Japanese Kanji meaning "jade tablet" or "gemstone," often symbolizing purity or high rank.
In this sentence, '圭' serves as a proper noun and represents a personal name.
圭は日本語を勉強しています。
Kei is studying Japanese.
Here, '圭' refers to a historical jade tablet used symbolically in ancient China.
古代の中国では、圭は貴族の象徴とされました。
In ancient China, kei was considered a symbol of nobility.
The word '圭' in this context refers to an object, specifically a jade item used ceremonially.