What is the meaning of あか?

, , , : (colour) red (reddish), scarlet, crimson, vermilion (vermeil), cinnabar, ruby-red (rubeus), cherry-red, cerise, cardinal-red, carmine, wine-red, claret-red, blood-red (sanguine), coral-red, cochineal-red, rose-red (rosy, damask), brick-red, maroon, rust-red (rusty), rufous-red, gules-red, rufescent, auburn, russet.

: dirt, grime

: copper

: bilge

閼伽: water offered to a buddha

亜科: subfamily

: entirely

: red

: red

: red

Source: wiktionary.org