become poorer or worse

not feeling well

in poor health; bad; badly

sick

having faults; not complete

flawed

unwell

not well

unwell; badly

not well

often ill; weak; causing, or likely to cause, a feeling of sickness or disgust

not healthy

below normal (especially intelligence)

deficient, inadequate

(a person who is) lower in rank or position; to consider or treat (a person, one's own wishes) as less important

lesser, supplementary

below the usual, average or expected standard

inferior

not acceptable

not suitable or satisfactory

neglected

shabby, in bad shape

not suitable or good enough; not healthy, strong

not appropriate or suited

harmful to bodily or mental health

sick