注意
ちゅうい · chuui · JLPT N4 · noun
attention
⚠️ 注意 = pour (注) + mind (意): pour your mind onto something
注 means to pour, as in 注ぐ (sosogu); 意 means mind or intention, as in 意味 (imi, meaning). Pouring your mind onto one thing is paying attention, and by extension taking caution. Sound hook: chuui is close to chewy, so chew carefully.
注 — water 氵 + master 主 (phonetic)
A semantic-phonetic compound: 氵 (water) gives the meaning of pouring or flowing, while 主 supplies the sound. The original sense was 'to pour water in,' which extended to 'concentrate, focus' (as in pouring attention) and 'to annotate' (pouring explanation into a text).