IPA: /ɪkˈsɛsɪvli/
KK: /ɪkˈsɛsɪvli/
In a way that is more than what is necessary or reasonable.
She was excessively worried about the small details of the project.
Excessively → It is formed from "ex-" (meaning out of or beyond) and "cedere" (meaning to go or yield), combined with the suffix "-ly" (meaning in a manner). The word "excessively" means in a manner that goes beyond what is normal or necessary.
Think of going 'beyond' ('ex-') what is usual or necessary — that's why excessively means too much.