acerb
adjective[L. acerbus; G. herbe, harsh, sour, tart, bitter, rough, whence herbst autumn, herbstzeit, harvest time. See Harvest.]
Sour, bitter, and harsh to the taste; sour, with astringency or roughness; a quality of unripe fruits.
[L. acerbus; G. herbe, harsh, sour, tart, bitter, rough, whence herbst autumn, herbstzeit, harvest time. See Harvest.]