The present participle of dunkle; the act of dipping or immersing something in liquid (archaic form).
The gerund/present participle form of 'dunkle,' formed by adding '-ing'. Part of the older conjugation system for this Germanic-derived verb.
Watching how 'dunkling' disappeared from English shows language constantly pruning verbs—it's not that the action changed, but speakers decided they preferred the shorter, cleaner 'dunking.'
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