inadequate

Definitions

Not enough or sufficient for a specific purpose or requirement.

Lacking the quality or quantity necessary to meet a standard.

Unable to deal with a situation or cope with life's demands.

Examples

The current security measures are completely inadequate to prevent a sophisticated cyberattack.

He felt that his previous training was inadequate for the challenges of the new position.

The supply of food and water proved inadequate for the number of people stranded in the storm.

Synonyms

insufficient deficient lacking meager scanty unsatisfactory incompetent

Antonyms

adequate sufficient ample enough satisfactory capable competent