This is the 5432nd most frequent Japanese word.
あおっ
"あおっ" is an informal expression derived from "青" (blue) and can imply a sudden or vivid mention of "blue" or "youthfulness." The exact meaning depends on context.
The word 'あおっ' ('blue') here is used to describe the clear, sunny sky, emphasizing its color.
空を見上げると、青空が広がっていました。
When looking up at the sky, a blue expanse stretched out.
The term 'あおっ' ('blue') metaphorically indicates paleness or an unhealthy appearance of the face.
事故の後、彼の顔は蒼白になりました。
After the accident, his face turned pale.
Here, 'あおっ' is used adjectivally to denote a color tone that resembles blue.