slantwise

1. not comparableDiagonal, in a direction or orientation between cardinal axes

   I can see it all now,—the slantwise rain / Of light through the leaves, / The sundown's blaze on her window-pane, / The bloom of her roses under the eaves.

   1858, John Greenleaf Whittier, "Telling the Bees" in The Works of John Greenleaf Whittier, Vol. I, Narrative and Legendary Poems, http://www.gutenberg.org/files/9567/9567-h/9567-h.htm#link2H_4_0045

comparative more slantwise · superlative most slantwise

1. Diagonally, in a direction or orientation between cardinal axes

   Slantwise, a salamander-shaped sea came at them, growing.

   1970, Larry Niven, Ringworld, page 113

   2 more examples

   […] he had received a cut slantwise along one temple and cheek, leaving a long scar like a streak of dawn's light falling athwart the dark visage.

   1924, Herman Melville, chapter 8, in Billy Budd, London: Constable & Co.

   Ms. Davis — who at different points in the set called to mind Andrew Hill, Cecil Taylor and Paul Bley, without resorting to mimicry — often led this charge, starting out with a blank canvas and creeping slantwise into a repeatable motif.

   2015 June 18, Nate Chinen, “Review: Eric Revis Trio Lets the Music Lead the Way at the Jazz Gallery”, in The New York Times, archived from the original on 16 Jun 2022