Unduly (adverb)

To an excessive or inappropriate degree.

Origin:

From the word "undue" which means not appropriate or not in proportion, and it comes from the latin "indebitus" which means unearned, not due.

Examples:

1. He was unduly influenced by the salesman's pitch.
2. She was unduly worried about the outcome of the exam.
3. His success was unduly attributed to luck.
4. He was unduly harsh on the new employee.
5. The criticism was unduly harsh and not justified.