beam
欐 centers on a structural beam: a horizontal timber used in building to support weight.
欐 combines 木 (tree/wood) with 麗, which likely contributes the sound and may carry a sense of paired or arranged things, suggesting a wooden beam placed in a structure.
The left side is 木 (wood), and the right side is 麗 (elegant/arranged). Picture an elegantly arranged wooden beam supporting a beautiful temple roof.
For レイ, imagine laying a wooden beam: lay -> レイ, as you lay the beam into place.