It's a matter of semantics; the only real difference between the meanings of those words is their social context not an anatomical difference.
thin. slender.
No, she is slender.
slender
skinny ( Apex)
I would use slender in place of skinny
The term "slender" is generally considered more polite and positive than "skinny." "Slender" conveys a sense of grace and elegance, while "skinny" can imply an unhealthy or overly thin appearance. Therefore, using "slender" is typically preferred in contexts where politeness and sensitivity are important.
...Seriously? Cuz he's Slender, meaning skinny, thin, etc.
skinny = dünn, mager.
Slim, skinny, slender.
slender mender
Very thin Waiflike Slender
slender mender