present participle of cum
"The small stream was flowing rapidly after the heavy rains, causing flooding in the valley below."
A surname.
"The professor Dr. Cumming gave an excellent lecture on quantum physics yesterday."
The word "cumming" entered English as a surname derived from the Scottish Gaelic Cuimeinich. This name likely originated from the Anglo-Norman phrase de Comyn, referring to places such as Commin in France or Comines in Belgium.