English Dictionary
Definition ill- in British English
ill- prefix
prefix
/ɪl/
1
badly: used with many past participles
Example
They were ill-equipped to fight.
Example
His lips moved in ill-disguised (=not well hidden) amusement.
2
bad or unpleasant: used with some nouns
Example
Prisoners complained of ill-treatment by the guards.

Related Words
Words related to ill-:
feeling (phrase)
can ill afford (to do) something (phrase)
for good or ill (phrase)
ill (adjective)
ill (adverb)
ill (noun)
ill at ease (phrase)
ill feeling (noun)
ill health (noun)
ill will (noun)
ill wind (noun)
ill- (prefix)
ill-advised (adjective)
ill-assorted (adjective)
ill-behaved (adjective)
ill-bred (adjective)
ill-concealed (adjective)
ill-conceived (adjective)
ill-considered (adjective)
ill-defined (adjective)
ill-disposed (adjective)
ill-equipped (adjective)
ill-fated (adjective)
ill-fitting (adjective)
ill-founded (adjective)
ill-gotten gains (noun)
ill-humored (adjective)
ill-informed (adjective)
ill-judged (adjective)
ill-mannered (adjective)
ill-prepared (adjective)
ill-starred (adjective)
ill-suited (adjective)
ill-tempered (adjective)
ill-timed (adjective)
ill-treat (verb)
it’s an ill wind (that blows nobody any good) (phrase)
wish someone (phrase)