Where does “proneness” come from?

I need to analyze this chain carefully, as it appears problematic. The chain provided is: English prone | Middle English -nesse | Latin pronus | English la | English lad | Proto-Indo-European bʰuH- | Proto-Indo-European per- | Latin illa This chain has several issues: - It's presented in newest-to-oldest order but contains logical gaps - "English la" and "English lad" don't appear to be legitimate steps in deriving "prone" or "proneness" - The connection to PIE roots and "Latin illa" seems disconnected from the Latin pronus path - The chain appears corrupted or nonsensical Given the rules state "State only what the chain supports. Do not invent dates, cognates, or intermediate steps," I cannot write an accurate sentence from this chain because the chain itself doesn't form a coherent etymological path. I cannot

proneness (English): The quality or state of being prone, or of...

Definitions

  1. The quality or state of being prone, or of...

Ancestry of “proneness”, step by step

StepLanguageWordMeaning
1English-nessAppended to adjectives to form nouns meaning "the...
2Middle English-nesseAffixed to adjectives to form abstract nouns...
3Old English-nesUsed to form abstract nouns, usually from...
4Proto-West Germanic-nassīUsed to form abstract nouns, usually from...
5Proto-Germanic-inassuz-ness
6Proto-West Germanic-ness, -th
7Proto-Germanic-į̄-th
8Proto-Indo-European-íh₂
9Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

Words derived from “proneness

Every word from Proto-Indo-European -h₂Every word from English -nessEvery word from Old English -nes