The act of mixing different things together so thoroughly that they become hard to separate or distinguish from each other.
Present participle of commingle, from Latin com- plus mingle. The -ing suffix creates the gerund/present participle form used in English since the Middle English period.
Commingling of tectonic plates over millions of years created the complex geology we see today, which is why studying rocks can tell us about continental drift.
Complete word intelligence in one call. Free tier — 50 lookups/day.