spindly (adj.)

• bony
• dilapidated
• doddering
• flat
• gangling
• gangly
• gaunt
• gawky
• groggy
• lank
• lanky
• lean
• meager
• ramshackle
• rangy
• rawboned
• rickety
• rocky
• scraggy
• scrawny
• shaky
• skeletal
• skinny
• spare
• spidery
• tottering
• tottery
• twiggy
• undersized
• underweight
• unsteady
• wobbly