If something is inadequate, there is not enough of it or it is not good enough. Supplies of food and medicines are inadequate = deficient adequate + inadequately in·ad·equate·ly The projects were inadequately funded
(sometimes followed by `to') not meeting the requirements especially of a task; "inadequate training"; "the staff was inadequate"; "she was inadequate to the job"
not sufficient to meet a need; "an inadequate income"; "a poor salary"; "money is short"; "on short rations"; "food is in short supply"; "short on experience"
If someone feels inadequate, they feel that they do not have the qualities and abilities necessary to do something or to cope with life in general. I still feel inadequate, useless and mixed up