来路不明

lái lù bù míng

释义

1. unidentified origin
2. no-one knows where it comes from
3. of dubious background

来路不明 的构成词

• 不 bù: no; not so
• 来 lái: to come
• 路 lù: road
• 不明 bù míng: not clear
• 来路 lái lù: incoming road
• 明 míng: bright