IPA: /ˈjʌŋnəs/
KK: /jʌŋnɪs/
The condition of being in the early stage of life; the time when someone is young.
The youngness of the children was evident in their playful behavior.
Youngness → It is formed from "young" (from Old English "geong", meaning youthful or not old) and "-ness" (a suffix meaning the state or quality of). The word "youngness" refers to the state or quality of being young.
Think of the word 'young' which describes someone youthful, and remember that 'youngness' means the quality of being youthful.