resemblance
肖 centers on the idea of resemblance: one thing looking like or being modeled after another.
肖 combines 月 (flesh/body) with ⺌ (small), suggesting a small likeness or physical resemblance. The exact historical development is uncertain, but the component relationship is broadly accepted.
The top ⺌ (small) sits above 月 (flesh/body), like a small copy of a body. Picture a tiny figurine that resembles a person: small body, strong resemblance.
For ショウ, imagine a show of look-alikes: a stage show where everyone resembles a celebrity. Show -> ショウ, and the whole performance is about resemblance.
portrait; likeness; picture
to share (someone's) good luck; to follow (someone's) example; to enjoy the same benefits (of someone or something); to capitalize (on the popularity of something)
unworthy (of one's father, teacher, etc.)
I; me
rights to usage of one's likeness
portrait
portrait painter