According to Merriam-Webster.com
Definition of EMPHATIC
: uttered with or marked by emphasis <an emphatic refusal>
: tending to express oneself in forceful speech or to take decisive action
: attracting special attention
: constituting or belonging to a set of tense forms in English consisting of the auxiliary do followed by an infinitive without to that are used to facilitate rhetorical inversion or to emphasize something
Adverb for emphatic
The teachers emphatic speech motivated her students to perform better in the class material.
In order for us to gain respect we must be emphatic about our demands and fight for what is right.
They were emphatically removed from the bar after refusing to leave a tip.