Synonyms for ill

adjective

• affected by an impairment of normal physical or mental function
• presaging ill fortune
• distressing
• indicating hostility or enmity
• resulting in suffering or adversity

noun

• an often persistent bodily disorder or disease; a cause for complaining

adverb

• (`ill' is often used as a combining form) in a poor or improper or unsatisfactory manner; not well
• unfavorably or with disapproval