to write, to indite
泐 centers on the act of writing or composing text, specifically to indite or put words into written form.
泐 combines 氵 (water) with 阞, which itself contains 力. The exact historical development is uncertain, and the connection between water and writing is not clearly established.
The water radical 氵 beside 阞 can be imagined as ink flowing like water onto a page, enabling one to write and indite.
For リョク, picture a writer dipping a brush into a bottle of ink labeled 'ryoku' (a made-up brand name): ryoku -> リョク, and the ink flows like water to write.