the.com/reciprocate
The social arithmetic where every gift quietly hands you an invoice.
means To respond to an action, feeling, or gesture with a matching one in return.
from From Latin reciprocus, meaning moving back and forth, like a tide that always returns whatever it takes.
Engine sensePistons reciprocate, pumping straight up and down endlessly.
Social glueNorm of reciprocity binds nearly every human culture.
Grammar twistReciprocal pronouns like each other split the favor.