Where does “thumbnail” come from?

Thumbnail comes from English thumb plus nail, with thumb tracing back through Middle English thoumbe and Old English þūma to Proto-Indo-European roots.

thumbnail (English): The fingernail on the thumb; A rough sketch; A...

Definitions

  1. The fingernail on the thumb; A rough sketch; A...

Ancestry of “thumbnail”, step by step

thumbnail traces back through two separate lines of ancestry.

via English thumb

StepLanguageWordMeaning
1EnglishthumbThe short thick digit of the hand that for humans...
2Middle Englishþombethumb; thumb-length; big toe
3Old Englishþūmathumb
4Proto-West Germanicþūmōthumb
5Proto-Germanicþūmôthumb
6Proto-Indo-Europeantūm-to grow; to swell, to increase; to swell, be...
7Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong

via English nail

StepLanguageWordMeaning
1EnglishnailThe thin, horny plate at the ends of fingers and...
2Middle EnglishnailAlternative form of nayl
3Old Englishnæġlnail
4Proto-West Germanicnaglnail; nail or peg used for fastening
5Proto-Germanicnaglaznail; nail or peg used for fastening
6Proto-Indo-Europeanh₃nogʰ-claw, nail; nail

Words derived from “thumbnail

Every word from Proto-Indo-European tewh₂-