
English word spectator comes from Proto-Indo-European *speḱ-, and later Proto-Indo-European *spéḱyeti (To be looking at, to keep looking at.)
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*speḱ- (Proto-Indo-European)
to look
*spéḱyeti (Proto-Indo-European)
To be looking at, to keep looking at.
*spekjō (Proto-Italic)
To observe, to see.
specio (Latin)
I observe, watch, look at.
spectator (Latin)
Spectator, watcher.
spectator (English)
One who watches an event; especially, one held outdoors.