When something is deemed to be inadequate, it is considered to be lacking or insufficient in some way. There are numerous synonyms for this common phrase, including unsatisfactory, deficient, insufficient, inferior, incomplete, and subpar. These terms all describe something that falls short of expectations, whether in terms of quality, quantity, or capability. Other synonyms for inadequate include insufficient, meager, limited, poor, defective, inadequate, incompetent, impotent, and feeble. It is crucial to remember that all of these words are subjective and depend on the specific situation and context in which they are being used.