For a more neutral tone:
* Insufficient: This emphasizes the lack of something needed.
* Limited: This suggests a restricted amount or scope.
* Unacceptable: This implies that something is not good enough.
* Unsatisfactory: This conveys a sense of disappointment.
* Subpar: This indicates a lower quality than expected.
For a more negative tone:
* Deficient: This emphasizes a lack of something essential.
* Unfit: This suggests something is not suitable for its purpose.
* Poor: This is a general term for something of low quality.
* Weak: This emphasizes a lack of strength or effectiveness.
* Pathetic: This is a stronger, more emotionally charged word.
For a more positive tone:
* Could be better: This suggests room for improvement.
* Needs improvement: This focuses on the need for change.
* Not ideal: This suggests a less than perfect situation.
Examples:
* Instead of: "The food was inadequate."
* You could say: "The food was insufficient." (neutral)
* Or: "The food was pathetic." (negative)
* Or: "The food could be better." (positive)
Ultimately, the best substitute for "inadequate" depends on the specific context and the tone you want to convey.