nonpromising en · ADJ
Etymology
From non- + promising.
Meanings
-
(not-comparable) unpromising
Apparently, either they are still in the trial period or some trials have shown nonpromising results.
2015 August 17, Anindita Banerjee et al., “Vitamin D and Alzheimer's Disease: Neurocognition to Therapeutics”, in International Journal of Alzheimer's Disease, volume 2015, →DOI: