ineffective

adjectives

not producing an intended effect

"an ineffective teacher"; "ineffective legislation"

is derived from

antonym

lacking in power or forcefulness

"an ineffectual ruler"; "like an unable phoenix in hot ashes"

ineffective, ineffectual, unable

is derived from

lacking the ability or skill to perform effectively; inadequate

"an ineffective administration"; "inefficient workers"

ineffective, inefficient

is derived from