| shriveled(adjective, underweight, slimness) |
| skinny(adjective, underweight, slimness) |
| slight(adjective, underweight, slimness) |
| slim(adjective, underweight, slimness) |
| slinky(adjective, underweight, slimness) |
| small(adjective, underweight, slimness) |
| spindly(adjective, underweight, slimness) |
| stalky(adjective, underweight, slimness) |
| starved(adjective, underweight, slimness) |
| stick(adjective, underweight, slimness) |
| stilt(adjective, underweight, slimness) |
| subtle(adjective, underweight, slimness) |
| threadlike(adjective, underweight, slimness) |
| twiglike(adjective, underweight, slimness) |
| underweight(adjective, slimness) |
| wan(adjective, underweight, slimness) |
| wasted(adjective, underweight, slimness) |
| weedy(adjective, underweight, slimness) |
| wizened(adjective, underweight, slimness) |
| thin as a rail(expression, underweight, slimness) |