the string of a musical instrument; by extension, string music, a stringed instrument, or a musical tone or melody; synonymous with 弦 xián

(literary) refers to a wife, specifically in the context of remarriage as in 续弦 xù​xián

the string of a bow; variant of 弦 xián

the mainspring or hairspring of a watch or clock; variant of 弦 xián

(geometry) a straight line joining two points on a curve, or the hypotenuse of a right triangle; variant of 弦 xián