ppl. a. [UN-1 8 b.] = next.

1

1834.  Ld. Houghton, Mem. Tour Greece, 140. Dumb forms, unimpregnate with vital emotion.

2

1849.  Lowell, Biglow P., Ser. I. Poet. Wks. (1912), 226/2. Lads, unimpregnate with the more sublimated punctiliousness of Walton.

3