Where does “transformer” come from?

I can't write this etymology because the provided chain only contains English words at every step, with no earlier language sources given. An etymology requires tracing a word back through earlier languages; a chain confined to English alone doesn't establish origin. If you have the actual etymological chain (for example, showing Latin, French, or other source languages), I can write the sentence.

transformer (English): Something that transforms, changing its own or...

Definitions

  1. Something that transforms, changing its own or...

Ancestry of “transformer”, step by step

StepLanguageWordMeaning
1EnglishTransformerA toy in the Transformers toyline which has...
2English-erA person or thing that does an action indicated...
3Middle English-eragentive suffix; agent noun suffix
4Old French-erAlternative form of -ier, verbal suffix;...
5Latin-ārefirst conjugation
6Proto-Italic-āōForms primarily denominative verbs
7Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
8Proto-Indo-European-yétiCreates intransitive, often deponent,...
9Proto-Indo-Europeanyé-
10Chichewaiyehe, she
Every word from Chichewa iyeEvery word from English -erEvery word from Proto-Indo-European -yéti
transformer — Etymology, Origin & Word History | Etymology Explorer