wriggling
譅 is a rare kanji whose core idea is wriggling, likely in a restless or twisting manner. Its standalone meaning is narrow and uncommon.
The exact historical development of 譅 is uncertain. It combines 言 (speech) with a right side that may have originally contributed sound or meaning, but the component relationships are not clearly established.
The left side 言 suggests words, and the right side looks like a tangled, wriggling shape. Imagine speech that twists and squirms like a wriggling creature.
For シュウ, picture a wriggling creature that makes a soft "shoo" sound as it moves: shoo -> シュウ, and the wriggling motion matches the kanji's meaning.
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