Present participle of 'anear'; drawing near or coming close to in archaic English.
From the verb 'anear' plus the present participle suffix '-ing.' This archaic form would have been common in Middle and Early Modern English before 'near' replaced it.
English speakers kept saying 'draw near' and 'come near' until 'near' alone became the verb we know today—'anearing' is a ghost word from when 'anear' was still thriving!
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