Syzygy must be really valuable in some word games. Such an odd little word.
I’ve run into the word syzygy in diverse contexts and wondered what the meanings had in common. According to the Online Etymology Dictionary, the word comes from
Greek syzygia “yoke, pair, union of two, conjunction”
It is used in biology to denote a pairing of chromosomes. Jung uses it to denote a pairing of opposites.
In astronomy it refers to an alignment of three objects in a gravitational system. In math it denotes an alignment of sorts, a linear combination of module generators that sums to 0.