Where does “puerileness” come from?

puerileness (English) comes from English puerile, from Latin puerīlis, from Latin -ilis, from Proto-Italic -elis, from Proto-Indo-European -elis, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

puerileness (English): The quality of being puerile; puerility

Definitions

  1. The quality of being puerile; puerility

Ancestry of “puerileness”, step by step

puerileness traces back through two separate lines of ancestry.

via English puerile

StepLanguageWordMeaning
1EnglishpuerileChildish; trifling; silly; Characteristic of, or...
2Latinpuerīlisboyish, youthful
3Latin-ilis-ile
4Proto-Italic-elis
5Proto-Indo-European-elis
6Proto-Indo-European-lósForms agent nouns from verbal roots

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European -lósEvery word from Latin -ilisEvery word from Latin puerīlis