water vein; underground stream
Refers to a natural underground flow of water, often encountered in geology, well-digging, or dowsing contexts.
There are abundant underground water veins in this area.
Before digging a well, they search for an underground stream.
A navigable route or channel on a body of water, similar to 澪 (みお). Less common than sense 1.
See also: 澪 (みお)
The boat entered the harbor through a narrow waterway.
Compound of 水 (water) and 脈 (vein, pulse), literally 'water vein'. The meaning extends from an underground water vein to a surface waterway by metaphorical association with a flowing line.