Words used to describe "relatively grand" include: Xuan, Bo, Hao, Qi, Shuo, etc.
1. Xuan
1. High.
2. A corridor or small room with a window (in the old days, it was often used as the name of a study or the name of a teahouse, restaurant, etc.).
3. An ancient car with a curtain and a high front roof.
4. Window; door.
Word groups: Xuan Miao, Xuan Chang, Xuanyuan, Xuanyuan, Xuanxie, etc.
2. Bo
1. Plenty (amount); rich.
2. Be knowledgeable.
3. Big.
Word groups: profound, broad, haobo, doctor, exposition, etc.
Hao group of words
Haobo
Very many; rich: quotations~.
The vastness
The water surface is vast and boundless: smoke waves~.
A vast ocean
Describes a very rich collection of documents and information. "Ru Zang Ji" written by Zhou Yongnian of the Qing Dynasty: "It may be said: 'The ancient and modern records are as vast as a sea of ??smoke.'" Hao: vast, numerous.
mighty
originally describes the vastness of water. Later, it describes the vastness and growth of things, or the huge flow of people moving forward.
Great momentum
Momentum: prestige and momentum; Hao: vast. The prestige and momentum are very strong.