One can cure oneself of the "not un-" formation by memorizing this sentence: "A not unblack dog was chasing a not unsmall rabbit across a not ungreen field."
Source: tatoeba (3469584)
Ungreen
Synonyms for "ungreen"
Ranked by relevance and common usage.
Sample sentences
34 total sentences available.
The ungreen emerald ring went round and round, and the ungreen emerald earrings swung: Thelma was working at the rim of her glass, too.
Source: wiktionary
The ungreen virescent exhibits a low rate of true photosynthesis (on both a leaf fresh weight and chlorophyll basis) compared to wild-type.
Source: wiktionary
Adam is also a member of the class of ungreen things, and by virtue of being ungreen can be an icon for ungreen things. But a poet who wanted to talk about ungreenness would have to take special pains to get us to notice that Adam was ungreen.
Source: wiktionary
Showing 4 of 34 available sentences.