形容詞 inadequate:

1. (sometimes followed by `to') not meeting the requirements especially of a task
2. not sufficient to meet a need
   同義詞：poor, short

1. The plan, brilliant in its conception, failed because of inadequate preparation.
   那計劃的構想倒是十分宏偉，但終因準備不足而告吹。
2. Considering the losses in the disaster area, our support was an utterly inadequate measure.
   比起災區(qū)的損失，我們的支援不過杯水車薪。
3. Inadequate food can stunt a child's development.
   食物不足能影響兒童的發(fā)育。
4. An instance of being inadequate; a failing or lack.
   不適當之處不充分的情況; 失敗或缺乏
5. His income is inadequate to meet the expense.
   他入不敷出。
6. His explanation is inadequate.
   他的解釋不充分。

in.ad.e.quate

adj.（形容詞）
Not adequate to fulfill a need or meet a requirement; insufficient.
不充分的：沒有足夠的能力來實現某種需求或達到某種要求的；不足的

【引伸】
inad.equately
adv.（副詞）