Use 'sweetish' when something has just a hint of sweetness, not overwhelmingly sweet.

Subtle Sweetness

'Sweetish' is often used when the sweetness is surprising or not typical for the food or drink.

Unexpected Flavor

Describes flavors that are not fully sweet, often mixed with other tastes like bitterness or saltiness.

Not Fully Sweet

 the filthy, protruding ears, those stained, fatty clothes Jews often have an unpleasant sweetish odor. If you have a good nose, you can smell the Jews." A more modern example comes from people who try to convince us that homosexuality is immoral. This is from an anti-gay website, where they said

The strange politics of...

 morula it's very nice sort of sweetish sort of smell Marilla but then you walk along and you stand on something and the smell is just hmm this plant yeah I don't know its name oh but it smells like diesel engine oil and if any of