瞭 is built from the 目 and 尞 (signal fire (in 僚·療)) components.
It belongs to a phonetic family with 療, 僚, 寮, and 遼 — they share the 尞 component and the reading リョウ.
A common word using 瞭 is 明瞭 (めいりょう), meaning “clarity”.
Kanji that look similar include 瞳, 霜, 瞬, and 箱.
