INEFFECTUAL Meaning of INEFFECTUAL in English [in.ef.fec.tu.al] adj (15c) 1: not producing the proper or intended effect: futile 2: ineffective 2. -- in.ef.fec.tu.al.i.ty n -- in.ef.fec.tu.al.ly adv -- in.ef.fec.tu.al.ness n Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012