lightproof

English

Etymology

Etymology tree
Proto-Indo-European *lewk-
Proto-Indo-European *-tós
Proto-Indo-European *lewktom
Proto-Germanic *leuhtą
Proto-West Germanic *leuht
Old English lēoht
Middle English light
English light
English proof
English -proof
English lightproof

    From light + -proof.

    Adjective

    lightproof (comparative more lightproof, superlative most lightproof)

    1. Sealed so that no light can enter.
      Unexposed photographic film must be kept in a lightproof container or it will be exposed and ruined.

    Translations

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