► weak not physically strong: The weakest members of the herd are attacked first.
► frail weak and thin because of old age or illness: My grandmother looked small and frail.
► feeble extremely weak, especially because of old age or illness: He was feeble and needed someone to take care of him.
► scrawny very thin and seeming weak or helpless: She was a scrawny little puppy with big eyes.
► shaky weak and unsteady because of illness, old age, or shock: I am still feeling shaky after falling off my bike.
► vulnerable easy to harm, hurt, or attack: Women who walk alone are vulnerable on the streets at night.
► defenseless unable to protect yourself from violence: The children were defenseless against their father’s anger.