過敏

1. Origins, structure, and basic meaning

• Structure: 過敏, read かびん, denotes an excessively sensitive response to a stimulus such as sound or criticism.
• Basic usage: It describes reacting excessively to loud sound or becoming more sensitive than necessary to criticism.

2. Common pitfalls and similar expressions

• Sensitivity beyond an appropriate degree
  • It carries an assessment that the response is excessive, rather than neutrally saying that perception is keen.