Chen Collection, Upper Volume
Radical: Sun (rì)
Kangxi strokes: 17
Page 500, Entry 38
In the Five Tones Collective Rhymes (Wuyin Jiyun), pronounced ai.
In the Jade Chapters (Yupian), the appearance of being dim or obscured.
Also, in the Book of Changes (Yijing), within the Abundance hexagram: To shade one's screen.
Commentary: A screen is something that covers and blocks the light.
In the Biography of Shentu Pan from the History of the Later Han (Hou Hanshu), to willingly remain hidden and obscured.
Commentary: The word ai is synonymous with being obscured.
Also, in the Spring and Autumn of Master Yan (Yanzi Chunqiu): The brightness of the stars is not equal to the dimness of the moon.
In the Encountering Sorrow (Lisao) by Qu Yuan: The light is dim and about to fade.
Commentary: Ai-ai describes a state of being dim and blurred.
Also, in the Supplement to the Rhymes (Yunbu), it is rhymed with the sound ji.
In the Rhapsody on the Lingguang Hall of Lu (Lu Lingguangdian Fu) by Wang Yanshou: Pushing open the golden gates to enter the north, the clouds in the sky are dense and dim.