IPA: /ædˈdʒɛktɪvli/
KK: /ædˈdʒɛktɪvli/
In a way that relates to or resembles an adjective.
The word 'quickly' can be used adjectivally to describe how something is done.
Adjectivally → It is formed from "adjectivus" (from Latin, meaning thrown to or added) and the suffix "-ally" (meaning in a manner). The word "adjectivally" means in a manner relating to or characteristic of an adjective.
Think of something being 'added' ('adjectivus') to a noun to describe it, and the '-ally' shows how it relates to that action.