moist, wet, dampen
浥 centers on adding moisture: making something moist, wet, or damp. The meanings are closely related applications of the same idea of introducing liquid.
浥 combines 氵 (water) with 邑, which likely contributes the sound. The character expresses the idea of wetting or moistening through the water radical.
Water 氵 beside 邑: imagine a city (邑) being dampened by a nearby river, making everything moist and wet.
For ユウ, picture you (ユウ) spilling water and dampening the ground: you -> ユウ, and the water 氵 makes things wet.