bypath
/ˈbaɪpɑːθ/noun
1- an indirect route旁道, 小径。
1.1
- figurative a minor or obscure branch or detail of a subject〈喻〉（学科的）次要（或晦涩）分支（或细节）：
the bypaths of European political life.
欧洲政治生活的细枝末节。