. . . the small lips compressed into a short tight line by the soul's need to govern its sensibility; the sallowness, the shawnness, the close-cropped iron-grey hair . . . —Max Beerbohm, 'Felix Argallo and Walter Ledgett'
This is hapax legomenon. The OED furnishes no clue what it might mean; yet the editions on Google Books agree on this reading.