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English word open comes from Proto-Indo-European *upo (Under, below.), Proto-Indo-European *up, Proto-Germanic *ūpaną
*upo (Proto-Indo-European)
Under, below.
*up (Proto-Indo-European)
*ūpaną (Proto-Germanic)
*upanaz (Proto-Germanic)
Open.
open (Old English)
Open.
open (Middle English)
open (English)
(electronics) a wire that is broken midway.. (with the) Open or unobstructed space; an exposed location.. (with the) Public knowledge or scrutiny; full view.. A sports event in which anybody can compete; as, the Australian Open.