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Webster 1913 Edition

Adj.

Diagonal; diametrical; hence; diametrically opposed.

[Obs.]

Sin can have no tenure by law at all, but is rather an eternal outlaw, and in hostility with law past all atonement; both

diagonal

contraries, as much allowing one another as day and night together in one hemisphere.

Milton.

diagonial ‎(not comparable)

Obsolete form of diagonal.
(obsolete) diametrically opposed
- Sin […] is […] in hostility with law past all atonement; both diagonal contraries, as much allowing one another as day and night together in one hemisphere. — Milton.