混血
こんけつ · konketsu · JLPT N1 · noun
race
混 — water radical 氵 + 昆 (kūn, phonetic)
A semantic-phonetic compound: 氵 (water) gives the meaning, while 昆 supplies the sound. The original sense was waters mingling or flowing together, which extended to 'mix, blend, confuse.' Modern uses like 混乱 (chaos) and 混合 (to mix) preserve this core idea of things merging.
血 — drop 丿 over dish 皿
Originally a pictograph of a sacrificial vessel (皿) with a drop of blood inside, marking the offering of blood in ancient rituals. The small stroke on top represents the blood itself. Over time it broadened from ritual blood to blood in general.