IPA: /ˈlæstɪŋnəs/
KK: /ˈlæstɪŋnəs/
The quality or state of continuing for a long time without change.
The lastingness of their friendship was evident even after many years apart.
**Lastingness** → It is formed from "lasting" (from the Old English *lastan*, meaning to continue or endure) and "-ness" (meaning the state or quality of). The word "lastingness" refers to the quality of enduring or continuing over time.
Think of the word 'lasting' which means to continue, and remember that 'lastingness' describes the quality of being able to endure over time.