This is the 4796th most frequent Japanese word.
水深
"Water depth."
The word "水深" (suishin) is used to denote the measurement of the depth of water in a specific body, such as a lake.
この湖の水深は約50メートルです。
The depth of this lake is approximately 50 meters.
Here, "水深" is used to discuss characteristics related to the depth of water in rivers, which is linked to their flow speed.
水深が深い川は流れが速いことがあります。
Rivers with deep water can sometimes have fast currents.
"水深" is referenced here in conjunction with measurement tools (depth gauge) utilized during navigation or water exploration.