the.com/retention

means The act or power of keeping something or someone in place — holding onto customers, water, or memories instead of losing them.

from From Latin retentio, from retinere — 're-' (back) plus 'tenere' (to hold), the same 'tenere' that gives us 'tenant' and 'tenacious.' It entered English through French in the medieval period, originally for physically holding something back, like a wall holding back water, long before it got drafted into boardrooms to describe holding onto customers and employees.