fluid, liquid, juice, sap, secretion
液 centers on a substance that flows or can be poured: a fluid or liquid. The meanings juice, sap, and secretion are natural specific kinds of liquid.
液 combines 氵 (water) with 夜, which likely contributes the sound エキ and may also suggest a flowing or spreading quality.
Water 氵 beside 夜: picture a night scene where dew or liquid flows quietly in the dark.
For エキ, imagine extracting liquid from a plant: extract -> エキ, and the juice flows out.
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blood
liquid; fluid
liquid
liquid crystal
semen; seminal fluid; sperm
saliva; sputum
body fluid
solution (liquid)
mucus; mucilage; viscous liquid; phlegm
liquid state
latex (milky fluid found in plants)
liquefaction
undiluted solution (of)
sap
gastric juice
aqueous solution
transfusion
waste liquid
liquid medicine
venom