Where does “opt-in” come from?

opt-in (English) comes from English in, from Middle English in, from Old English in, from Proto-West Germanic *in.

opt-in (English): The property of having to choose explicitly to...

Definitions

  1. The property of having to choose explicitly to...

Ancestry of “opt-in”, step by step

opt-in traces back through two separate lines of ancestry.

via English in

StepLanguageWordMeaning
1EnglishinUsed to indicate location, inclusion, or position...
2Middle EnglishinAny kind of accomodation; particularly; A home or...
3Old Englishinin; Alternative form of inn
4Proto-West Germanic*in

via English opt

StepLanguageWordMeaning
1EnglishoptTo choose; select
2Frenchopterto opt
3Latinoptōto choose, select, prefer, opt
4Proto-Italic*opetāō
Every word from Proto-West Germanic *inEvery word from Old English inEvery word from Middle English in