The Collaborative International Dictionary
Aggravatingly
Aggravatingly \Ag"gra*va`ting*ly\, adv. In an aggravating manner.
Wiktionary
aggravatingly
adv. In an aggravating manner.
WordNet
aggravatingly
adv. in an aggravating fashion; "his hair was caught aggravatingly in the branches of the tree"
Usage examples of "aggravatingly".
As he did so, the autofire stopped, but the aggravatingly slow, single shots persisted at his back.