To exert or apply effort, force, or influence together with someone else toward the same goal.
From 'co-' (together) plus 'exert,' which comes from Latin 'exserere' (to thrust out or put forth). The term developed in English to describe joint application of effort or power.
When teammates coexert themselves in the final minutes of a game, they're literally putting out force together—it's the difference between one person trying hard and everyone pulling in the same direction at once.
Complete word intelligence in one call. Free tier — 50 lookups/day.