insufficient
adj.adj. not enough of something for a specific purpose. You use this when there is a lack of what is needed.
adj. lacking in quality or quantity to meet a specific requirement or standard.
The evidence was insufficient to prove his guilt.
The rescue team had to turn back because they had insufficient fuel to reach the summit and return safely.
Economists argued that the stimulus package was insufficient to prevent a long-term recession, noting that the capital injection failed to reach the most vulnerable sectors of the workforce.
From Middle French insufficient, from Latin insufficiens. See also in- + sufficient.
Commonly followed by the preposition 'for' or a 'to-infinitive' clause.
the insufficient of foodthe insufficiency of foodLearners often use the adjective 'insufficient' where the noun 'insufficiency' or 'shortage' is required.