A town has a front and a back. The front is the main road: buses, lit signs, shops that want to be seen. Walk one row behind it and you are on the backstreets, narrow and quiet, with houses, small workshops and washing hung across the lane. Hold that one step behind the main road, because every use of this word is standing there. Say it of a place and you get the old, cheap, unshowy part of town. Say it of the people and you get who lives there. And say it of work, and the same position turns hard: whatever is done back here is done out of sight of the people who check.
From the word’s history
The source gives it plainly: back plus street.
來源資料只寫一句：backstreet 就是 back 加 street。字面上就是「後面的街」，而這個字所有的意思都還黏在這個位置上。
packet evidence: Wiktionary etymology_text for backstreet, adjective and noun entries (source_refs kaikki:3f6f69a190036ae4:1536153282:3158 and :1536156440:680) — 'From back + street.'
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