Unduly means in an unjustifiable manner or to an excessive degree. She unduly worried about her test score and her grade for the class.

Unduly is an adverb. It is used to modify adjectives or other adverbs to indicate that something is excessive or inappropriate.

The word "unduly" appears on page 58 in the book "Hatchet" by Gary Paulsen. It is mentioned in the sentence: "He smiled, not at all unduly proud of himself, and began to rifle through the contents of the pack."

unduly