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concurrently

/kənˈkɜrəntli/

At the same time; occurring together

From Latin con- (together) + Latin curr- (run).

adverb
concurrent
Latin
concurrēns
Present participle of concurrō, “running together” or “happening at the same time”
Old French
concurrent
“Acting together; concurrent,” borrowed from Latin
Middle English
concurrent
“Acting in conjunction; contributing to the same result”
Modern English
concurrent
“Existing or happening at the same time”; concurrently adds the adverbial suffix -ly
Modern English
concurrently

Picture two runners charging toward the same place: that is the image inside Latin concurrō, built from con-, “together,” and currere, “to run.” But the Romans could make the picture more dramatic: concurrere also meant to rush together into a clash or battle, before developing the calmer sense “to happen at the same time.” English picked up concurrent in the late fourteenth century, initially for things acting together or producing one effect; by the late fifteenth century, it could also mean running side by side. The same running root appears in current, course, recur, and cursor—so when events occur concurrently, they are metaphorically racing along neighboring tracks. Add -ly, and the adjective becomes an instruction about timing: do it while the other runner is still moving.

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