The spelling of "cumming" can be a bit confusing, as it can refer to both the surname "Cumming" and the verb "coming" in its gerund form. The pronunciation, however, is different. The surname "Cumming" is pronounced with the stress on the first syllable, /ˈkʌmɪŋ/. On the other hand, the gerund form of "coming" is pronounced with the stress on the second syllable, /ˈkʌmɪŋ/. It's important to pay attention to context when spelling and pronouncing this word to avoid confusion.
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The word cumming is derived from the Old English term cuman, which means to come or to arrive. In Old English, it was originally spelled as cym(e)an or cuman and had various forms and spellings over time. Eventually, it evolved into the present-day spelling coming or cumming, where the o was replaced with a u.