drift, flow
漾 centers on gentle, continuous movement on or like water: drifting along a current or flowing smoothly.
漾 combines 氵 (water) with 羕, which likely contributes the sound and the idea of long, flowing movement. The exact historical development of 羕 is uncertain.
Water 氵 on the left and a shape 羕 that suggests something long and waving: picture a leaf drifting on a flowing stream, carried gently along.
For ヨウ, imagine a leaf drifting on the water, and you yell 'Yo!' as it floats by: yo -> ヨウ, and the leaf continues its gentle drift.