impotable, a.
(ɪmˈpəʊtəb(ə)l)
[f. im-2 + potable.]
Undrinkable.
| 1608 A. Willet Hexapla in Exod. 224 Bitter waters..impotable and vnpleasant. 1885 Pop. Sci. Monthly XXVI. 532 Distilled water is made impotable and unhealthy by any traces of that [hydrochloric] acid. |