IPA: /ˈpɪvɪtəli/
KK: /ˈpɪvətli/
In a way that is crucial or essential to the outcome of something.
The decision pivotally influenced the direction of the project.
Pivotally → It is formed from "pivot" (from Old French *pivot*, meaning a pin or shaft on which something turns) and "-ally" (meaning in a manner relating to). The word "pivotally" means in a manner that relates to a pivot or central point of turning.
Think of a 'pivot' as a central point around which things turn, and remember that 'pivotally' describes something that relates to that central turning point.