An inadequate quantity of; not enough.
Insufficient time is available to reflect on the problem.
A quantity (of something) that is less than is needed.
Insufficient of the building remains to determine its age.
Not sufficient; of a type or kind that does not suffice, that does not satisfy requirements or needs.
an insufficient amount
From Middle French insufficient, from Latin insufficiens. See also in- + sufficient.
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Not sufficient; lacking competent power or ability; unqualified, unequal, unfit.
Brother Coſroe, I find my ſelfe agreeu’d, Yet inſufficient to expreſſe the ſame: For it requires a great and thundering ſpeech: […]