useless Copy link Outline 1. ĭnūtĭlis, e2. cassus (empty)3. ĭnānis, vānus4. irrĭtus (ineffectual)5. incommŏdus, ĭnhăbĭlis • useless: 1. ĭnūtĭlis, e: Caes.: Cic.: Hor. 2. cassus (empty): u. toils, c. labores, Plin. Ep. 8, 23: u. prayers, c. vota, Virg. Aen. 12, 780. 3. ĭnānis, vānus: v. vain, empty. 4. irrĭtus (ineffectual): a u. undertaking, i. inceptum, Liv. 29, 35. 5. incommŏdus, ĭnhăbĭlis: v. unfit. To be u.: nihil valere, nihil proficere, usum nullum habere: v. to use. A u. fellow, homo ad nullam rem utilis, Cic. Off. 3, 6, 29. U. may be expr. by circuml. with adv. frustra, incassum. To make u.: frustrari: Col.: v. frustrate.