the.com/relationship
Two nervous systems agreeing to malfunction in roughly the same direction.
means An ongoing emotional connection between people, defined by mutual investment, expectation, and the negotiation of two separate lives.
from From Latin 'relatus,' to carry back or refer — literally how two things stand connected; the romantic monopoly on the word is recent and slightly greedy.
Status inventionIt's complicated predates Facebook by centuries.
Brain chemistryEarly love resembles obsessive-compulsive disorder on scans.
Word rangeAlso describes math, physics, and tax law.