緊張

The core image of "kinchō" is a state of being "stretched tight," like a string on a bow. While often translated as "nervous," it describes a state of heightened alertness and mental pressure rather than just general anxiety.

In a psychological context, it is most commonly used with the verb "suru" (緊張する) to mean "to get nervous." This can be either negative (paralyzing fear) or positive (a healthy level of focus and readiness). For example, "tekido na kinchō-kan" (適度な緊張感) refers to a productive level of tension that keeps one sharp.

When referring to physical tension, it describes the rigidity of muscles or the tightness of a material. In a socio-political context, it describes a fragile peace or a strained relationship where conflict is imminent. Unlike "fuan" (不安), which is a vague feeling of unease, "kinchō" implies a specific, acute state of pressure or strain.