sickly (adj.)

• achromatic
• achromic
• ailing
• anemic
• ashen
• ashy
• bloodless
• cachectic
• cadaverous
• cloying
• colorless
• cranky
• dead
• debilitated
• delicate
• dim
• dimmed
• dingy
• diseased
• down
• drained
• drawn
• dull
• enervated
• etiolated
• exhausted
• exsanguine
• faded
• failing
• faint
• fallow
• feeble
• flat
• frail
• ghastly
• gray
• haggard
• hueless
• indisposed
• infirm
• insalubrious
• insipid
• invalid
• lackluster
• leaden
• livid
• low
• lurid
• lusterless
• mat
• maudlin
• mawkish
• mealy
• mean
• moribund
• morose
• muddy
• mushy
• neutral
• noisome
• noxious
• off-color
• offish
• pale
• pale-faced
• pallid
• pasty
• peaked
• peaking
• peaky
• poorly
• puny
• reduced
• run-down
• sallow
• sick
• sickish
• toneless
• uncolored
• unhealthful
• unhealthy
• unsound
• valetudinarian
• valetudinary
• wan
• washed-out
• watery
• waxen
• weak
• weakened
• weakly
• white