nicfa experimental gismu

x₁ (vector) is the displacement of x₂ (object/point) relative to x₃ (object/point; contextless default: origin) in coordinate system/frame of reference/as measured by x₄ according to definition/standard/(meta)physics x₅

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.

jbovlaste

In notes:

nifkemtemsalri: x₁ (vector) is the differintegral (with respect to time) of order x₂ of the displacement of x₃ (object/point) relative to x₄ (object/point/frame of reference; contextless default: the origin in the home frame) in coordinate system/frame of reference/as measured by x₅ according to definition/standard/(meta)physics x₆, taken with starting point x₇
nifkemtemsalryke'ecusna: x₁ (scalar-valued) is the magnitude of the vector of the differintegral (with respect to time) of order x₂ of the displacement of x₃ (object/point) relative to x₄ (object/point/frame of reference; contextless default: origin) in coordinate system/frame of reference/as measured by x₅ according to definition/standard/(meta)physics x₆, where the differintegral is taken with starting point x₇, in metric/by definition x₈
danci: x₁ is the spacial interval/geodesic segment (or line segment/ray/line) from location/point x₂ to location/point x₃ in geometry/frame of reference x₄.