This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
爉 combines 火 (fire) with the phonetic component 巤. The exact historical meaning is uncertain, but it likely relates to fire or burning.
Fire 火 beside the complex 巤 shape suggests something related to flames or heat, but the exact meaning is unclear.
For ロウ, imagine a low fire burning beside the 巤 component: low -> ロウ.