insufficient
//ˌɪnsəˈfɪʃənt//
Adjective
insufficientCanonical form
more insufficientComparative
most insufficientSuperlative
1
Not enough in quantity, degree, or quality to meet a particular need or requirement.
The evidence was insufficient to prove his guilt.
2
Lacking the necessary ability, skill, or resources to accomplish something.
He felt insufficient to handle such a complex project on his own.