Longman Dictionary of Contemporary English homepage

insufficient

 adjective
     
in‧suf‧fi‧cient formal
not enough, or not great enough:
Insufficient resources have been devoted to the health service.
insufficient for
His salary was insufficient for their needs.
insufficient (something) to do something
The heating is insufficient to kill the bacteria.
At the moment, there's insufficient evidence to arrest anyone.
—insufficiently adverb
—insufficiency noun [singular, uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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