ineffective

Not producing an intended effect; ineffectual.

Inadequate; incompetent.

Not effective; not producing any effect, or the effect desired; wanting effective energy or operation; inefficient; impotent: as, ineffective efforts; an ineffective blow.

Not effective; not having the desired effect; ineffectual; futile; inefficient; useless.

not having the desired effect; ineffectual

lacking in ability; incompetent or inadequate

not producing an intended effect

lacking in power or forcefulness

lacking the ability or skill to perform effectively; inadequate