wide, beautiful
曼 centers on something stretched out or extended, giving the sense of wide or long. The beautiful meaning likely comes from the idea of something gracefully elongated or drawn out.
曼 is thought to combine 冒 (covering) and 又 (hand), suggesting a hand drawing something out or extending a cover, leading to the idea of length or width. The exact historical development is uncertain.
The top part looks like a wide eye (罒) under the sun (日), and the bottom is a hand (又). Imagine a hand stretching a wide canvas under the sun to create a beautiful, expansive scene.
For マン, picture a wide, beautiful manga (漫画) page spread out: manga -> マン, and the wide layout matches the kanji's meaning.
mandala
four types of mandala (in Shingon)
red spider lily (Lycoris radiata); cluster amaryllis; cluster belladonna; manjusaka
samya mandala (in Shingon); mandala where each deity is represented by an object (lotus flower, gem, sword, etc.)
Mandala of the Two Realms; Womb Realm and Matrix Realm Mandalas
Mandala of the Two Realms; Womb Realm and Matrix Realm Mandalas
four types of mandala (in Shingon)
great mandala (in Shingon); mandala with an image of each deity
Salamander (video game)
dharma mandala (in Shingon); mandala were each deity is represented by its seed syllable in Sanskrit
karma mandala (in Shingon); three-dimensional mandala with a sculpture of each deity
Garbhadhatu Mandala; Womb Realm Mandala; Matrix Realm Mandala
Garbhadhatu Mandala; Womb Realm Mandala; Matrix Realm Mandala
Vajradhatu Mandala; Diamond Realm Mandala