boyishness
noun
- childishness/youthfulness (state/quality of being boyish)
Wiktionary
noun
Etymology: Etymology tree English boyish Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English boyishness From boyish + -ness.
- The quality of being boyish.
“That slightly wide-eyed boyishness has given him a career playing ordinary people in extraordinary circumstances, whether that be everyone's favourite idiot-savant Forrest Gump (1994), a pilot who saves the day in Sully (2016), or the beleaguered Captain Miller of Saving Private Ryan (1998).”