decidedly

adverb2

1. •
   In a manner which leaves little question; definitely, clearly.

   • In a decidedly petulant manner she sat with crossed arms and a frown.
2. •
   In a decided or final manner; resolutely.

   • ‘We can't,’ said Vera decidedly, ‘we haven't any boats and we're cut off by a raging torrent from any human habitation.’ — 1914