Open English Wordnet
Nouns
(n)ailment, complaint, illan often persistent bodily disorder or disease; a cause for complaining Adjectives
(a)ill, sickaffected by an impairment of normal physical or mental function“ill from the monotony of his suffering” (s)illresulting in suffering or adversity“ill effects”,
“it's an ill wind that blows no good” (s)illdistressing“ill manners”,
“of ill repute” (s)illindicating hostility or enmity“you certainly did me an ill turn”,
“ill feelings”,
“ill will” (s)ill, inauspicious, ominouspresaging ill fortune“ill omens”,
“ill predictions”,
“my words with inauspicious thunderings shook heaven” (P.B.Shelley),
“a dead and ominous silence prevailed”,
“a by-election at a time highly unpropitious for the Government” Adverbs
(r)ill, badly, poorly(‘ill’ is often used as a combining form) in a poor or improper or unsatisfactory manner; not well“he was ill prepared”,
“it ill befits a man to betray old friends”,
“the car runs badly”,
“he performed badly on the exam”,
“the team played poorly”,
“ill-fitting clothes”,
“an ill-conceived plan” (r)ill, badlyunfavorably or with disapproval“tried not to speak ill of the dead”,
“thought badly of him for his lack of concern” (r)illwith difficulty or inconvenience; scarcely or hardly“we can ill afford to buy a new car just now”