ebb tide; falling tide
Refers to the outgoing or receding tide, the period when the sea level is falling.
When the tide is going out, you can walk out to the distant rocks.
The fisherman set out aiming for the ebb tide.
Standard kanji spelling for ebb tide.
Compound of 下げ (sage, 'lowering') + 潮 (shio, 'tide'). The reading さげしお is a straightforward combination of the kun'yomi readings of the two kanji.