Harmfully [adverb]
Definition of Harmfully:
dangerously, critically
Sentence/Example of Harmfully:
When we act contentiously and harmfully and passionately and violently, to what have we declined?
Wherever Government interference operates at all, it is almost sure to operate harmfully.
If the green parrot is less harmfully mischievous than the crow he is far more offensively noisy.
He glared harmfully, but saw Singleton shut his book, and his little beady eyes began to roam from berth to berth.
It has also been found by opticians and doctors that hardly anything will affect the eyes harmfully quicker than gum-chewing.
Mental energy is exerted harmfully within the machine instead of in doing work.