undernourished (adj.)

• attenuated
• beggarly
• cadaverous
• emaciated
• empty-handed
• famished
• haggard
• hollow-eyed
• ill-equipped
• impoverished
• jejune
• peaked
• peaky
• pinched
• poor
• puny
• shriveled
• skeletal
• starved
• starving
• underfed
• undermanned
• unfed
• wasted
• withered
• wizened
• wraithlike