| extenuated(slender, gaunt, rangy, gangling, gangly) |
| faint(adjective, uncertain, feeble, shaky, hesitant) |
| feeble(adjective, weak, thin, uncertain, hesitant) |
| fibrous(tough, narrow, slim, sinewy) |
| floppy(dull, lifeless, limp) |
| friable |
| gracile |
| gristly(tough, thin, narrow, slim, sinewy) |
| hesitant(adjective, uncertain, feeble, shaky, sluggish) |
| infirm(adjective, uncertain, feeble, shaky, hesitant) |
| irresolute(adjective, uncertain, feeble, shaky, hesitant) |
| lackadaisical(adjective, uncertain, feeble, shaky, hesitant) |
| languid(adjective, uncertain, feeble, shaky, hesitant) |
| languorous(adjective, uncertain, feeble, shaky, hesitant) |
| leggy(tall, lanky, gangling, gangly, long-legged) |
| lifeless(dull, limp) |
| long(tough, thin, narrow, slim, sinewy) |
| long-legged(tall, lanky, gangling, gangly) |
| long-limbed(tall, lanky, long-legged) |
| lumbering(tall, lanky) |