Here are some synonyms for trepidation:
* Fear
* Anxiety
* Dread
* Apprehension
* Nervousness
* Unease
* Disquiet
Examples of trepidation:
* "She felt a surge of trepidation as she walked into the interview room."
* "The children approached the haunted house with trepidation."
* "He faced the challenge with a mixture of trepidation and excitement."
In essence, trepidation is a feeling of anticipatory fear or worry, often associated with something unknown or potentially dangerous.