Something that is ~ is not large enough in amount or degree for a particular purpose. (FORMAL)
He decided there was ~ evidence to justify criminal proceedings...
= inadequate
ADJ: oft ADJ to-inf, ADJ for n
insufficiency
Late miscarriages are usually not due to hormonal insufficiency.
N-UNCOUNT
~ly
Food that is ~ly cooked can lead to food poisoning.
ADV: ADV adj/-ed