A hole or pit in boggy land, often created by digging for peat or naturally formed in marshy terrain.
From 'bog' (soft wetland) + 'hole' (Old English 'hol' meaning cavity or opening). Compound word combining two Old English/Gaelic elements to describe a physical feature of bog landscapes.
Bog-workers in Ireland and Scotland would dig bogholes to extract peat for fuel—these holes sometimes filled with water and became culturally significant, even appearing in folklore as places where supernatural things happened.
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