INSUFFI'CIENT, adjective [in and sufficient.] 1. Not sufficient; inadequate to any need, use or purpose. The provisions are insufficient in quantity and defective in quality. 2. Wanting in strength, power, ability, or skill; incapable; unfit; as a person insufficient to discharge the duties of an office.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI