The company's response to the customer's complaint was inadequate.

He always feels like an inadequate.

He was inadequately prepared for the exam.

The inadequateness of the team's training was evident in their performance.

The inadequatenesses of the current system are causing many problems.

The company's efforts to address the inadequates in their training program were commendable.

There are several inadequations in the system that need to be addressed.

The inadequation between his words and actions was evident.