Plural of birl; multiple instances or acts of spinning logs, or in the alternate sense, plural of birl as a noun meaning celebrations.
Simple plural of 'birl,' though 'birl' primarily functions as a verb. Some historical uses show 'birl' as a noun in logging contexts.
Interestingly, 'birl' mostly works as a verb in English ('to birl'), but language users creatively nominalize it—turning actions into nouns is how English constantly creates new words and meanings!
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