timorously, apprehensively, shyly, diffidently, timidly, nervously, with fear and trembling, shrinkingly, for fear of, with heart in mouth, in terror, in fright, in trepidation, in alarm.
awfully, frightfully, excessively; see very.
"fearfully." YourDictionary, n.d. Web. 09 August 2018. <http://thesaurus.yourdictionary.com/fearfully>.
fearfully. (n.d.). Retrieved August 09th, 2018, from http://thesaurus.yourdictionary.com/fearfully