IPA: /ɪˈluː.mə.neɪ.tɪŋ.li/
KK: /ɪˈluːməneɪtɪŋli/
In a way that makes something clear or easier to understand.
The teacher explained the concept illuminatingly, helping all the students grasp the difficult topic.
Illuminatingly → It is formed from "illuminare" (from Latin, meaning to light up or make clear) and the suffix "-ly" (meaning in a manner). The word "illuminatingly" means in a manner that lights up or makes something clear.
Think of 'lighting up' ('illuminare') to remember that 'illuminatingly' means doing something in a way that makes it clear or bright.