This is the 8355th most frequent Japanese word.
循環
"Circulation" or "cycle."
The word '循環' (circulation) is used to describe the continuous movement or flow of water within natural systems, such as evaporation, condensation, and precipitation.
水は自然界で循環しています。
Water circulates within nature.
Here, '循環' refers to the systematic movement of blood through the circulatory system in a biological context.
血液は体内を循環している。
Blood circulates within the body.
In this sentence, '循環' signifies the repeated and sustainable utilization pattern of resources, promoting ecological balance.