An archaic or dialectal term meaning to crawl, creep, or move along close to the ground.
From Middle English, possibly related to Old English or Germanic roots meaning to crawl or grovel. The exact origin is uncertain, but it's similar to 'grovel' in meaning.
This is a wonderfully obscure word that shows how English had different words for different kinds of movement—'growse' was specifically for that undignified crawling motion you might see a baby or animal making.
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