English

instream

From in- + stream.

Formed from in- + stream

Proto-Indo-European *h₁én ‘in’

Proto-Germanic *in ‘into’

English in-

Proto-Indo-European *srew- ‘to flow’

…

Proto-Germanic *straumaz

Proto-West Germanic *straum

Old English strēam

Middle English streem

Today it means

verb To flow or stream in; flow or stream into.

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

Etymograph / instream