inadequate adj.
1 not good enough
VERBS appear, be, look, prove, seem | become | consider sth, find sth, judge sth, regard sth as, think sth These precautions have been judged inadequate.
ADV. deeply, grossly, hopelessly, ludicrously, pitifully, ridiculously, seriously, very, woefully His wages were pitifully inadequate for the needs of his growing family. | completely, entirely, quite, totally, utterly, wholly | increasingly | somewhat | clearly, manifestly, obviously, patently, plainly | curiously | notoriously
PREP. at People, despite their intelligence, are curiously inadequate at communicating with horses. | for This computer is clearly inadequate for my needs.
2 not able to deal with a situation
VERBS be, feel, seem I felt dreadfully inadequate.
ADV. deeply, dreadfully, hopelessly, very | quite, totally, wholly | rather | generally | personally, professionally, sexually The staff at the consulate seemed not only insensitive, but professionally inadequate.
PREP. to She was inadequate to the demands that were made on her.
You can also check other dicts: inadequate (English, 中文解释 ), wordnet sense, Collins Definition