explain in detail
覼 centers on explaining something in thorough detail, often by examining or looking closely at it. The idea is to lay out all aspects so nothing is left unclear.
覼 combines 見 (see, look) with 爾, which likely contributes a sound element. The idea of looking closely to explain in detail fits the semantic component 見.
The left side 爾 looks like a dense, intricate pattern, and the right side 見 means 'see'. Imagine examining a complex design so carefully that you can explain every tiny detail.
For ラ, picture a scholar explaining a detailed diagram while singing 'la la la' to remember the key points: la -> ラ, and the detailed explanation flows like a song.