enfeebled

emaciated

Abnormally wasted from hunger

• gauntLean from deprivation
• skeletalOf or like bones
• wastedUsed without good result
• shrunkenReduced from original dimensions

wizened · atrophied · starved · undernourished · underfed · haggard · cadaverous · pinched

frail

Weak and breakable

• debilitatedMade weak or infirm
• infirmWeak in body
• weakenedMade less capable
• fragileEasily broken or damaged

decrepit · withered · tottering · unsteady · shaky · tremulous · wobbly · faltering

fatigued

Drained of energy

• drainedEmptied of resources
• wearyDeeply tired, spent
• spentExhausted or disbursed
• tiredLacking energy, needing rest

sapped · depleted · worn-out · prostrate · flagging · listless · languid · enervated

elderly

Advanced in age

• agedAdvanced in years
• infirmWeak in body
• geriatricRelating to elderly care
• decrepitWorn by age

senescent · doddering · ancient · frail · failing · declining · superannuated · worn

ailing

In poor health

• sicklyProne to poor health
• unwellExperiencing poor health
• afflictedSuffering from something harmful
• strickenSeriously affected by adversity

diseased · chronic · debilitated · bedridden · recuperating · convalescing · languishing · poorly

defenseless

Without means to resist

• helplessUnable to act independently
• powerlessLacking strength or authority
• exposedOut in open
• unprotectedWithout safeguard or shield

susceptible · at-risk · endangered · precarious · dependent · incapable · impotent · ineffectual

reduced

Made less in amount

• lessenedMade or became smaller
• weakenedMade less capable
• impairedWeakened in function
• compromisedMade vulnerable to harm

attenuated · curtailed · eroded · degraded · deteriorated · declining · waning · fading

pale

Lacking color intensity

• wanPale and unwell-looking
• pallidUnhealthily lacking color
• sallowUnhealthily yellowish complexion
• ashenPale, grayish-white

waxy · blanched · washed-out · sickly · sunken · hollow-eyed · ghostly · bloodless