Thin in an unattractive or unhealthy way
thin adjective
someone who is thin has very little fat on their body
skinny adjective
very thin, in a way that is not attractive. Someone who is thin in an attractive way is slender or slim
underweight adjective
thinner and lighter than normal, especially in a way that is unhealthy
gaunt adjective
very thin, usually because you are ill, tired, or worried
scrawny adjective
very thin, in a way that is not attractive or healthy
lanky adjective
tall, thin, and not very graceful
emaciated adjective
extremely thin because of serious illness or lack of food
anorexic adjective
extremely thin
gangling adjective
very tall and thin, with long arms and legs, and not graceful
be (all) skin and bone(s) phrase
to be very thin in a way that is not healthy or attractive