adverb
timidly; nervously; with trepidation
Describes doing something in a hesitant, fearful manner, often because the situation feels risky or dangerous. Reduplication of 危ない (dangerous), emphasizing a state of caution or anxiety.
彼は危な危なと綱を渡った。
He crossed the rope timidly.
初めての発表で、危な危なと話し始めた。
At her first presentation, she started speaking nervously.