x_{1} (vector) is the displacement of x_{2} (object/point) relative to x_{3} (object/point; contextless default: origin) in coordinate system/frame of reference/as measured by x_{4} according to definition/standard/(meta)physics x_{5}

x1 is (four-)vector-valued; it is a function that maps to a tensor (probably a vector or scalar) to a (four-)vector. Units are handled in x1, which will be a (four-)vector of mitre or the like. Time of measurement is just «ca» or the argument of the function(s) in x1, or can be defined instantaneously by x4. Proposed short rafsi: -nif-. See also: nifkemtemsalri.

- nifkemtemsalri
- x
_{1}(vector) is the differintegral (with respect to time) of order x_{2}of the displacement of x_{3}(object/point) relative to x_{4}(object/point/frame of reference; contextless default: the origin in the home frame) in coordinate system/frame of reference/as measured by x_{5}according to definition/standard/(meta)physics x_{6}, taken with starting point x_{7} - nifkemtemsalryke'ecusna
- x
_{1}(scalar-valued) is the magnitude of the vector of the differintegral (with respect to time) of order x_{2}of the displacement of x_{3}(object/point) relative to x_{4}(object/point/frame of reference; contextless default: origin) in coordinate system/frame of reference/as measured by x_{5}according to definition/standard/(meta)physics x_{6}, where the differintegral is taken with starting point x_{7}, in metric/by definition x_{8} - danci
- x
_{1}is the spacial interval/geodesic segment (or line segment/ray/line) from location/point x_{2}to location/point x_{3}in geometry/frame of reference x_{4}.