Where does “onlooker” come from?

I need to work through this chain carefully to understand the sense development, but I notice the chain provided seems fragmented and doesn't clearly lead to "onlooker." Let me trace what's given: - English on - Japanese 音読み (on'yomi - "Sino-Japanese reading") - Japanese 音 (on - "sound") - Latin -are (infinitive ending) - Latin -arius (agent/instrument suffix) - Proto-Indo-European óynos - Proto-Indo-European aukw- (meaning uncertain from context) This chain doesn't coherently explain "onlooker" - it seems to mix unrelated etymological paths. An "onlooker" should derive from "on" + "look" + "-er", but the chain provided doesn't support this formation clearly. Given the instruction to "state only what the chain supports" and that the

onlooker (English): A spectator; someone looks on or watches, without...

Definitions

  1. A spectator; someone looks on or watches, without...

Ancestry of “onlooker”, step by step

onlooker traces back through two separate lines of ancestry.

via English Look

StepLanguageWordMeaning
1EnglishLookTo try to see, to pay attention to with one’s eyes
2French-erForms infinitives of first-conjugation verbs
3English-erA person or thing that does an action indicated...
4Middle English-eragentive suffix; agent noun suffix
5Old French-erAlternative form of -ier, verbal suffix;...
6Latin-ārefirst conjugation
7Proto-Italic-āōForms primarily denominative verbs
8Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
9Proto-Indo-European-yétiCreates intransitive, often deponent,...
10Proto-Indo-Europeanyé-
11Chichewaiyehe, she

via English on

StepLanguageWordMeaning
1EnglishonIn the state of being active, functioning or...
2Middle Englishonon, in; on; Alternative form of oon
3Old Englishonon, in, at, among; from
4Proto-West Germanicanaon
5Proto-Germanic*an
6Proto-Germanicanaon, at; on, onto; ana
7Proto-Indo-Europeanh₂en-on, onto
Every word from Chichewa iyeEvery word from English -erEvery word from French -er