sourish

Duke Vincentio finally returns to square these various accounts, "measure for measure," and give this sourish play an ambiguously happy ending.

From Time Magazine Archive

When it has stood by for some time, it acquires an agreeable sourish taste, quite different from the flavour of the fresh plant.

From Lachesis Lapponica A Tour in Lapland, Volume 1 by Carl von Linn?

Slightly sour; subÐacid; sourish; as, an acidulous tincture.

From Webster's Unabridged Dictionary by Noah Webster

They are raised on the bare surface of the rock in some parts of the Hawaiian islands, and a sourish liquor is procured from them.

From The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. by P. L. Simmonds

Boniclapper is milk which has stood till it has acquired a pleasant sourish taste, and a thick slippery substance.

From The Cook and Housekeeper's Complete and Universal Dictionary; Including a System of Modern Cookery, in all Its Various Branches, Adapted to the Use of Private Families by Mary Eaton