The kanji 了了 primarily conveys the idea of "completion," "finished," or "to end." It signifies that something has come to a conclusion or a state of being done. It can also imply understanding or comprehension.

・On-yomi (音読み): リョウ ・Kun-yomi (訓読み): おわ（る）, お（わる）

⚫︎ 終了（しゅうりょう） Translation: End; finish; completion. ⚫︎ 了解（りょうかい） Translation: Understanding; comprehension; acknowledgement; agreement. ⚫︎ 終わりました。 Translation: It is finished./ I'm done.

The kanji 了了 is considered to be a pictograph. It depicts a child or baby with its arms and legs bent, essentially showing the form "born" or "complete." Initially, it might have represented the completion of a child's birth or the act of being "born" into existence. Over time, the meaning broadened to encompass the general idea of completion.