Where does “non-streamlined” come from?

non-streamlined (English) comes from English streamlined, from English streamline, from English stream, from Middle English streem, from Middle English strem, from Old English strēam, from Proto-West Germanic straum, from Proto-Germanic straumaz — to flow; to guard; to bind, to tie together.

Ancestry of “non-streamlined”, step by step

StepLanguageWordMeaning
1EnglishstreamlinedDesigned to offer little resistance to the flow...
2EnglishstreamlineA line that is tangent to the velocity of flow of...
3EnglishstreamA small river; a large creek; a body of moving...
4Middle EnglishstreemAlternative form of strem
5Middle EnglishstremA waterbody; a region of the world containing...
6Old Englishstrēamcurrent; stream
7Proto-West Germanicstraumstream
8Proto-Germanicstraumazstream, current, river
9Proto-Indo-Europeansrowmosriver
10Proto-Indo-Europeansrew-to flow, stream
11Proto-Indo-Europeanser-to flow; to guard; to bind, to tie together
Every word from Proto-Indo-European ser-
non-streamlined — Etymology, Origin & Word History | Etymology Explorer