Insufficient means not enough for what is needed. Insufficient evidence, insufficient funds, insufficient time.
It is formal and belongs to findings and refusals: insufficient evidence to charge, insufficient funds — the phrase a bank uses when a payment fails. It is a statement about a requirement rather than about a quantity, so what is insufficient for one purpose may be plentiful for another. Note insufficiency; and sufficient, which does the same work in the positive direction.
1adjectiveinsufficientNot enough for what is needed.
“The judge dismissed the case because of insufficient evidence.”
synonyms: inadequate, lacking
insufficient is a quality of shortfall.
Latin insufficiens is in- plus sufficiens, from sufficere, to supply — sub plus facere, to make. Suffice and sufficient come from the same supplying.
Latin
insufficiens
Middle French
insufficient
English, today
insufficient
From Middle French insufficient, from Latin insufficiens. See also in + sufficient.
Etymology from Wiktionary, CC BY-SA