Present participle of beglad; the act of making glad or gladdening.
From beglad with the present participle suffix -ing. The gerund form allows the verb to function as a noun or to show ongoing action.
The -ing suffix is one of English's most versatile endings—it can nominalize verbs ('running is fun'), form progressive aspects ('I am running'), and create adjectives ('a running joke'). It's from Old English and has barely changed in 1,000 years.
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