The answer would be Suddenly
In the beginning and restarted at the end.
It is an aggressive word and is usually used when you want the audience to perceive it as a negative action without straight up telling them. In definition, it is harassment, and thus produces an unfavorable effect for those on the receiving end, but the connotation is that the effect is more severe.
He used magic to make it look like a dream like state in the red death and the tone helped create expression in the poem
The answer is B. to Propel something