IPA: /ˈprɒmɪsɪŋli/
KK: /ˈprɑːmɪsɪŋli/
In a way that shows potential for success or improvement.
The project is progressing promisingly, indicating that we may achieve our goals soon.
Promisingly → It is formed from "promising" (from the verb "promise", which comes from Latin "promittere", meaning to send forth or to promise) and the suffix "-ly" (meaning in a manner of). The word "promisingly" means in a manner that shows potential or promise.
Think of someone 'sending forth' ('promittere') their potential — that's why promisingly means showing potential in a manner.