excellent, rare, beautiful, fine
禕 centers on exceptional quality: something excellent, rare, beautiful, or fine. The meanings all point to a high degree of positive distinction.
禕 combines 示 (altar, spirit) with 韋, which likely contributes the sound. The exact historical development is uncertain, but the character is associated with fine or excellent qualities, possibly through the idea of something spiritually or ritually distinguished.
The left side 示 suggests something set apart or special, like an offering. The right side 韋 looks like a wrapped bundle. Picture a beautifully wrapped, rare gift placed at an altar: it is excellent and fine.
For イ, imagine an eagle (イーグル) admiring a rare, beautiful object: eagle -> イ, and the eagle's keen eye picks out the finest thing.