the.com/couples
Two people who finished each other's sentences and started splitting the bill.
means Pairs of people in a romantic or domestic relationship, treated as a single social unit.
from From Latin copula, a bond or tie — the same root that yokes oxen, marriages, and grammar's linking verbs.
Plural logicOne couple, two people, infinite shared passwords.
Grammar twinSame root gave us copulate and couplet.
Physics borrowIn mechanics, a couple is a turning force.