Where does “barechestedness” come from?

barechestedness (English) comes from English barechested, from English chested, from English chest, from English Chester, from English molester, from English -er, from Middle English -er, from Old French -er — he, she.

Ancestry of “barechestedness”, step by step

barechestedness traces back through two separate lines of ancestry.

via English barechested

StepLanguageWordMeaning
1EnglishbarechestedHaving one's chest bare; shirtless
2Englishchestedsimple past tense and past participle of chest;...
3EnglishchestA box, now usually a large strong box with a...
4EnglishChesterA child molester
5EnglishmolesterAgent noun of molest: one who molests;...
6English-erA person or thing that does an action indicated...
7Middle English-eragentive suffix; agent noun suffix
8Old French-erAlternative form of -ier, verbal suffix;...
9Latin-ārefirst conjugation
10Proto-Italic-āōForms primarily denominative verbs
11Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
12Proto-Indo-European-yétiCreates intransitive, often deponent,...
13Proto-Indo-Europeanyé-
14Chichewaiyehe, she

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 Chichewa iye