stiffly stiffly /ˈstɪfli/

adverb

1. () In a stiff manner  ( stiff , stiffly )
   in a stiff manner
    His hands lay stiffly
   his hands lay stiffly
   
2. () In a rigid manner  ( bolt , stiffly , rigidly )
   in a rigid manner
    The body was rigidly erect
   the body was rigidly erect
    He sat bolt upright
   he sat bolt upright