melt, dissolve, thaw
溶 centers on a solid turning into liquid: melting, dissolving, or thawing. The idea is always a transition from solid to fluid, whether from heat or a solvent.
溶 combines 氵 (water) with 容, which likely contributes the sound and the idea of containing or taking shape. The character suggests a solid taking on a liquid form.
Water 氵 plus 容 (contain, form) suggests a solid losing its shape and becoming liquid. Picture ice melting into water that takes the shape of its container.
For ヨウ, imagine a yo-yo melting in the sun: yo -> ヨウ, and the plastic dissolves into a puddle.
to melt; to liquefy; to soften (e.g. through heat); to thaw
to melt; to liquefy; to thaw
welding
lava
dissolution; dissolving; solution (e.g. chemical)
melting; fusion
solution (liquid)
solvent; solution; flux
to melt into; to dissolve into; to merge into
to mix (e.g. water with flour); to dissolve (salt in water, paint, etc.); to mix in
smelting furnace; blast furnace
solvent
aqueous solution
soluble
integration (e.g. social); mixing; penetration
insolubility
liquation; elution
dissolved
hemolytic streptococcus
hemolysis