Etymograph

English

loopback

From loop + back.

A compound of loop + back

Proto-Indo-European *klewb- ‘to spring’

Proto-Germanic *hlaupaną ‘to leap, run’

Old Norse hlaupa ‘to leap’

Old Norse hlaup ‘a run’

Middle English loupe ‘noose, loop’

English loop

Proto-Germanic *baką ‘back’

Proto-West Germanic *bak

Old English bæc

Middle English bak ‘the back’

English back

Today it means

noun The routing of a signal, data stream, etc. from its origin back to the origin, primarily as a means of testing the transmission or transportation infrastructure.

Language periods are conventional ranges, not dates for this word.

Etymograph / loopback

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