ineffectual Copy link Outline 1. irrĭtus (without effect)2. imbellis, e (of no warlike force)3. vānus • ineffectual: 1. irrĭtus (without effect): an i. remedy, ir. remedium, Tac. H. 4, 81: i. missiles, ir. tela, Virg.: v. fruitless. 2. imbellis, e (of no warlike force): an i. weapon, i. telum, Virg. Aen. 2, 544. 3. vānus: v. vain, idle (III.).