IPA: /spɒnˈsɔːrɪəl/
KK: /ˈspɒnsərɪəl/
Relating to a person or organization that provides support or funding for an event, activity, or project.
The sponsorial support from local businesses helped the charity event succeed.
Sponsorial → It is formed from "sponsor" (from Latin "sponsorem", meaning one who pledges or promises) and "-ial" (meaning relating to). The word "sponsorial" refers to something that is related to or characteristic of a sponsor.
Think of a 'sponsor' who makes a promise or pledge, and remember that 'sponsorial' means relating to that promise or pledge.