- decrepit, debile, feeble, infirm, sapless, weak, weakly - lacking physical strength or vitality; "a feeble old woman"; "her body looked sapless"
Antonym: robust (indirect, via frail)
- sapless - destitute of sap and other vital juices; dry; "the rats and roaches scurrying along the sapless planks"- Norman Mailer
Antonym: juicy (indirect, via juiceless)