QUO NIHIL PRUSTRA
\kwˈə͡ʊ nˈa͡ɪəl pɹˈʌstɹə], \kwˈəʊ nˈaɪəl pɹˈʌstɹə], \k_w_ˈəʊ n_ˈaɪ_ə_l p_ɹ_ˈʌ_s_t_ɹ_ə]\
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Lat. Which [does or requires] nothing in vain. Which requires nothing to be done, that is, to no purpose. 2 Kent, Comm. 53. Quae non fieri debent, facta valent. Things which ought not to be done are held valid when they have been done. Tray. Lat Max. 484. Qnae non valeant singula, juncta juvant. Things which do not avail when separate, when joined avail. 3 Bulst 132; Broom, Max. 588.
By Henry Campbell Black
