Trepid:
(adjective) timid by nature or revealing timidity [Vocabulary.com]
Hah! I’ve not actually ever seen this word in writing anywhere that I can recall. While I was watching our elder cat, Mayhem, now in his twentieth year, contemplate a leap down from a counter, it occurred to me that he should be showing more trepidation. The adjective intrepid flashed to mind, followed by the question, What is the root of trepidation?
Example: It was a trepid koala, even for its kind, terrified of the shaking leaves that formed its tenuous diet.