decidedly
US /dɪˈsaɪ.dɪd.li/
UK /dɪˈsaɪ.dɪd.li/

1.
without doubt; unquestionably
:
•
The new policy is decidedly unpopular.
•
She looked decidedly uncomfortable.
2.
in a way that shows determination
:
•
He walked decidedly towards the door.
•
She shook her head decidedly.