Where does “undercover” come from?

Undercover comes from English under combined with cover, ultimately from Proto-Indo-European n̥dʰér meaning beneath.

undercover (English): Performed or happening in secret; Employed or...

Definitions

  1. Performed or happening in secret; Employed or...

Ancestry of “undercover”, step by step

undercover traces back through two separate lines of ancestry.

via English cover

StepLanguageWordMeaning
1EnglishcoverA lid; Area or situation which screens a person...
2Middle Englishcoverento recover
3Old Frenchcovrirto cover
4Latincooperiōto cover wholly or over, overwhelm, clothe
5Latincōn-Used in compounds to indicate a being or bringing together of several objects
6Latincumwith, along with; at; -fold
7Old LatincomAlternative form of cum
8Proto-Italickomwith, along, at
9Proto-Indo-Europeanḱómbeside, near, by, with
10Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
11Middle Englishkyt
12Germankittputty certain kinds of cement used for fixing e.g. window panes
13Old High Germankuti
14Proto-West Germanickwidugum, resin
15Proto-Germanickweduzresin
16Proto-Indo-Europeangʷet-resin, gum; to say, speak
17Proto-Indo-Europeangū-to bend; curve; arch; vault; to bow, bend, arch,...

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Germanic*under
5Proto-Indo-European*(H)n̥dʰérunder, below

Words derived from “undercover

Every word from Proto-Indo-European gū-