trepidatious
Concise Oxford English Dictionary © 2008 Oxford University Press:
trepidatious /ˌtrɛpɪˈdeɪʃəs/
▶adjective informal apprehensive or nervous; filled with trepidation.
– derivatives
trepidatiously adverb.
trepidatiously adverb.
'trepidatious' also found in these Oxford entries:

