* agitatedly
* alarmingly
* anxiously
* apprehensively
* cautiously
* creepily
* dreadfully
* eerily
* fearfully
* fiercely
* frantically
* frighteningly
* gruesomely
* hauntingly
* horrifyingly
* menacingly
* ominously
* passionately
* perilously
* relentlessly
* savagely
* sinisterly
* spookily
* startinly
* terrifyingly
* threateningly
* uneasily
* unexpectedly
* violently
* wickedl
y