Meaning: blue/green*
Readings: あお、あおい、セイ、ショウ
Components: 月 (moon), and “growing”
My hack: I think of the song “Blue Moon” and change some of the lyrics.
Blue Moon
You saw me growing alone….
*Traditionally blue and green are covered by the same word 青, but in modern Japanese the word 緑（みどり）refers to green as most English speakers understand it. Traffic lights are still considered 青 though!
It looks like a traffic light to me. Like, on a fancy post with the chinese-style triple-roof above it. and the last part of the light isn’t finished. The last part is green, so that’s what it means. I know it seems complicated, but it’s simple to remember once you get it.