The term “coalesce” is pronounced with the stress on the second syllable: /kols/. It is a verb that means to come together or unite, often in a gradual or natural way. For example, water droplets can coalesce to form a larger body of water.
The word “coalesce” is derived from the Latin word “coalescere”, which means “to grow together”. It has been used in the English language since the 16th century.