Examples from the Web for sweetish
The odor of the root is weak and unpleasant, the taste mucilaginous, sweetish and somewhat bitter.Ginseng and Other Medicinal Plants|A. R. (Arthur Robert) Harding
They knocked at the door, and Cyril followed his aunts into grandfather's hot, sweetish room.The Garden Party|Katherine Mansfield
Its root is sweetish and mucilaginous, and is used as a substitute for liquorice (Indian liquorice).
The sweetish liquid is contained, like the juices of plants generally, in cells.
It sometimes has a sweetish smell, or a smell suggestive of mushrooms even when no spawn has run through it.Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.|George Francis Atkinson