concentrated, thick, dark, undiluted
濃 centers on high density or intensity: a liquid that is concentrated and undiluted, a color that is dark and thick, or a flavor that is strong and rich.
濃 combines 氵 (water) with 農, which likely contributes the sound ノウ and the idea of richness or thickness, as in a concentrated liquid.
The water radical 氵 beside 農 suggests a liquid that has been reduced or enriched, like a thick, dark, concentrated broth.
For ノウ, imagine a concentrated soup so thick you can almost say 'no' to adding more water: 'No' -> ノウ, the soup stays undiluted.
deep (colour); dark
rich (flavor, color, etc.); strong (e.g. odor); heavy; thick (soup, makeup, etc.); dense
concentration; density
concentration (e.g. of a solution); enrichment; condensation
Shinano (former province located in present-day Nagano Prefecture and parts of Gifu Prefecture)
dense; thick; rich (flavour, colour, etc.); deep; strong (smell); heavy; detailed (description); close (relationship); intimate
Mino (former province located in the south of present-day Gifu Prefecture)
strongish; somewhat strong
light and shade; shade (of colour, color)
dark blue
heavy fog; dense fog; thick fog
marked; pronounced; showing a strong tendency (towards)
rich (taste); dark-coloured; thick; heavy
dark green; deep green
uranium enrichment
chūnō sauce; semi-sweet sauce made from fruit and vegetables
low concentration
common walnut (Juglans regia); Persian walnut; English walnut
Trollius riederianus var. japonicus (Japanese variety of the Kamchatka globeflower, Trollius riederianus)
Shinano whiskered bat (Myotis ikonnikovi hosonoi); Hosono's myotis