decidedly

Etymology

From decided + -ly.

adv

1. In a manner which leaves little question; definitely, clearly.
   In a decidedly petulant manner she sat with crossed arms and a frown.
   'I understand it was the big American man with a decidedly unpleasant face.' 1934, Agatha Christie, chapter 7, in Murder on the Orient Express, London: HarperCollins, published 2017, page 121
   In time The Simpsons would, indeed, resort to spoofing such decidedly non-spooktacular fare like E.T and Mr. And Mrs. Smith (both in “Treehouse Of Horror XVIII”) but in 1992 the field was wide-open and the show could cherry-pick the most iconic and beloved fright fare of all time. April 29, 2012, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “Treehouse of Horror III” (season 4, episode 5; originally aired 10/29/1992)”, in (Please provide the book title or journal name)
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, Saki, ‘The Lull’, Beasts and Superbeasts