f1 = r1 = x1 (event; perhaps: spacetime coordinates) is a solstice of extreme r3 = x2 ("ka" construct or season; default: "ka zmadu", which means "Winter solstice", unless context makes this interpretation untenable) at location/of or for celestial body/object d3 = x3 with respect to orbit/sun x4.
This word is exactly analogous to "3 = x3 with respect to orbit/sun x4.">dornilteikezraifau" and (conceptually speaking) does nothing other than merely multiplying dornilteikezraifau2 by -1. All of the notes and commentary for that word apply here. See also: "ctenilteikeznulfau".