impetus

I don’t think that I want to take eight bars of so and so’s song and throw them into mine, but the impetus, or the feeling of their song, triggered something in me.

She says there appears to be new impetus from the board and donors.

Mr Brown added the case "runs the risk of acting as an impetus for further protests, some of which may be disorderly, around other asylum accommodation".

The impetus for this widespread wild weather was a late-arriving monsoonal pattern, fueled by the region’s lingering heat that pulled atmospheric moisture north — and, with it, instability.

They also warned that the interim injunction risked "acting as an impetus for further violent protests" around other asylum accommodation.