a. Rather or somewhat bitter. Hence Bitterishness sb.

1

1605.  Timme, Quersit., II. vii. 141. The bitterish Guaiacum.

2

1684.  Bunyan, Pilgr., II. 194. The Water … tasted a little Bitterish to the Palat.

3

1849–52.  Todd, Cycl. Anat. & Phys., IV. 858/1. A slightly bitterish sensation is produced.

4

1702.  Floyer, in Phil. Trans., XXIII. 1164. Its … taste, which is crude and styptic, with a bitterishness in the Seed.

5