IPA: /ˈstraɪkɪŋli/
KK: /ˈstraɪkɪŋli/
In a way that is very noticeable or impressive.
The painting was strikingly beautiful, capturing everyone's attention.
Strikingly → It is formed from "striking" (from the verb "strike", meaning to hit or impact) and "-ly" (a suffix used to form adverbs). The word "strikingly" means in a manner that has a strong impact or is very noticeable.
Think of something that makes a strong 'impact' ('strike') and how it is done 'in a way' ('-ly') that catches your attention.